Remove margin: 0 from <pre> styling.

This seems to break some themes which were not expecting Pygments to
change margins, and it doesn't look like it makes a difference for
standalone Pygments.

34 files changed, 34 insertions, 34 deletions

diff --git a/pygments/formatters/html.py b/pygments/formatters/html.py
index 0fa3f641..e49b88cd 100644
--- a/pygments/formatters/html.py
+++ b/pygments/formatters/html.py
@@ -581,7 +581,7 @@ class HtmlFormatter(Formatter):
 
     @property
     def _pre_style(self):
-        return 'line-height: 125%; margin: 0;'
+        return 'line-height: 125%;'
 
     @property
     def _linenos_style(self):
diff --git a/tests/html_linenos_expected_output/inline_nocls_step_1_start_1_special_0_anchor.html b/tests/html_linenos_expected_output/inline_nocls_step_1_start_1_special_0_anchor.html
index d0b25e79..6098070d 100644
--- a/tests/html_linenos_expected_output/inline_nocls_step_1_start_1_special_0_anchor.html
+++ b/tests/html_linenos_expected_output/inline_nocls_step_1_start_1_special_0_anchor.html
@@ -1,5 +1,5 @@
 <div class="highlight" style="background: #f8f8f8">
- <pre style="line-height: 125%; margin: 0;"><span></span><span style="color: #000000; background-color: #f0f0f0; padding-left: 5px; padding-right: 5px;">1</span><span style="color: #408080; font-style: italic"># a</span>
+ <pre style="line-height: 125%;"><span></span><span style="color: #000000; background-color: #f0f0f0; padding-left: 5px; padding-right: 5px;">1</span><span style="color: #408080; font-style: italic"># a</span>
 <span style="color: #000000; background-color: #f0f0f0; padding-left: 5px; padding-right: 5px;">2</span><span style="color: #408080; font-style: italic"># b</span>
 <span style="color: #000000; background-color: #f0f0f0; padding-left: 5px; padding-right: 5px;">3</span><span style="color: #408080; font-style: italic"># c</span>
 </pre>
diff --git a/tests/html_linenos_expected_output/inline_nocls_step_1_start_1_special_0_noanchor.html b/tests/html_linenos_expected_output/inline_nocls_step_1_start_1_special_0_noanchor.html
index d0b25e79..6098070d 100644
--- a/tests/html_linenos_expected_output/inline_nocls_step_1_start_1_special_0_noanchor.html
+++ b/tests/html_linenos_expected_output/inline_nocls_step_1_start_1_special_0_noanchor.html
@@ -1,5 +1,5 @@
 <div class="highlight" style="background: #f8f8f8">
- <pre style="line-height: 125%; margin: 0;"><span></span><span style="color: #000000; background-color: #f0f0f0; padding-left: 5px; padding-right: 5px;">1</span><span style="color: #408080; font-style: italic"># a</span>
+ <pre style="line-height: 125%;"><span></span><span style="color: #000000; background-color: #f0f0f0; padding-left: 5px; padding-right: 5px;">1</span><span style="color: #408080; font-style: italic"># a</span>
 <span style="color: #000000; background-color: #f0f0f0; padding-left: 5px; padding-right: 5px;">2</span><span style="color: #408080; font-style: italic"># b</span>
 <span style="color: #000000; background-color: #f0f0f0; padding-left: 5px; padding-right: 5px;">3</span><span style="color: #408080; font-style: italic"># c</span>
 </pre>
diff --git a/tests/html_linenos_expected_output/inline_nocls_step_1_start_1_special_3_anchor.html b/tests/html_linenos_expected_output/inline_nocls_step_1_start_1_special_3_anchor.html
index 9a0ae65c..8a417269 100644
--- a/tests/html_linenos_expected_output/inline_nocls_step_1_start_1_special_3_anchor.html
+++ b/tests/html_linenos_expected_output/inline_nocls_step_1_start_1_special_3_anchor.html
@@ -1,5 +1,5 @@
 <div class="highlight" style="background: #f8f8f8">
- <pre style="line-height: 125%; margin: 0;"><span></span><span style="color: #000000; background-color: #f0f0f0; padding-left: 5px; padding-right: 5px;">1</span><span style="color: #408080; font-style: italic"># a</span>
+ <pre style="line-height: 125%;"><span></span><span style="color: #000000; background-color: #f0f0f0; padding-left: 5px; padding-right: 5px;">1</span><span style="color: #408080; font-style: italic"># a</span>
 <span style="color: #000000; background-color: #f0f0f0; padding-left: 5px; padding-right: 5px;">2</span><span style="color: #408080; font-style: italic"># b</span>
 <span style="color: #000000; background-color: #ffffc0; padding-left: 5px; padding-right: 5px;">3</span><span style="color: #408080; font-style: italic"># c</span>
 </pre>
diff --git a/tests/html_linenos_expected_output/inline_nocls_step_1_start_1_special_3_noanchor.html b/tests/html_linenos_expected_output/inline_nocls_step_1_start_1_special_3_noanchor.html
index 9a0ae65c..8a417269 100644
--- a/tests/html_linenos_expected_output/inline_nocls_step_1_start_1_special_3_noanchor.html
+++ b/tests/html_linenos_expected_output/inline_nocls_step_1_start_1_special_3_noanchor.html
@@ -1,5 +1,5 @@
 <div class="highlight" style="background: #f8f8f8">
- <pre style="line-height: 125%; margin: 0;"><span></span><span style="color: #000000; background-color: #f0f0f0; padding-left: 5px; padding-right: 5px;">1</span><span style="color: #408080; font-style: italic"># a</span>
+ <pre style="line-height: 125%;"><span></span><span style="color: #000000; background-color: #f0f0f0; padding-left: 5px; padding-right: 5px;">1</span><span style="color: #408080; font-style: italic"># a</span>
 <span style="color: #000000; background-color: #f0f0f0; padding-left: 5px; padding-right: 5px;">2</span><span style="color: #408080; font-style: italic"># b</span>
 <span style="color: #000000; background-color: #ffffc0; padding-left: 5px; padding-right: 5px;">3</span><span style="color: #408080; font-style: italic"># c</span>
 </pre>
diff --git a/tests/html_linenos_expected_output/inline_nocls_step_1_start_8_special_0_anchor.html b/tests/html_linenos_expected_output/inline_nocls_step_1_start_8_special_0_anchor.html
index d7417f90..58bbddc8 100644
--- a/tests/html_linenos_expected_output/inline_nocls_step_1_start_8_special_0_anchor.html
+++ b/tests/html_linenos_expected_output/inline_nocls_step_1_start_8_special_0_anchor.html
@@ -1,5 +1,5 @@
 <div class="highlight" style="background: #f8f8f8">
- <pre style="line-height: 125%; margin: 0;"><span></span><span style="color: #000000; background-color: #f0f0f0; padding-left: 5px; padding-right: 5px;"> 8</span><span style="color: #408080; font-style: italic"># a</span>
+ <pre style="line-height: 125%;"><span></span><span style="color: #000000; background-color: #f0f0f0; padding-left: 5px; padding-right: 5px;"> 8</span><span style="color: #408080; font-style: italic"># a</span>
 <span style="color: #000000; background-color: #f0f0f0; padding-left: 5px; padding-right: 5px;"> 9</span><span style="color: #408080; font-style: italic"># b</span>
 <span style="color: #000000; background-color: #f0f0f0; padding-left: 5px; padding-right: 5px;">10</span><span style="color: #408080; font-style: italic"># c</span>
 </pre>
diff --git a/tests/html_linenos_expected_output/inline_nocls_step_1_start_8_special_0_noanchor.html b/tests/html_linenos_expected_output/inline_nocls_step_1_start_8_special_0_noanchor.html
index d7417f90..58bbddc8 100644
--- a/tests/html_linenos_expected_output/inline_nocls_step_1_start_8_special_0_noanchor.html
+++ b/tests/html_linenos_expected_output/inline_nocls_step_1_start_8_special_0_noanchor.html
@@ -1,5 +1,5 @@
 <div class="highlight" style="background: #f8f8f8">
- <pre style="line-height: 125%; margin: 0;"><span></span><span style="color: #000000; background-color: #f0f0f0; padding-left: 5px; padding-right: 5px;"> 8</span><span style="color: #408080; font-style: italic"># a</span>
+ <pre style="line-height: 125%;"><span></span><span style="color: #000000; background-color: #f0f0f0; padding-left: 5px; padding-right: 5px;"> 8</span><span style="color: #408080; font-style: italic"># a</span>
 <span style="color: #000000; background-color: #f0f0f0; padding-left: 5px; padding-right: 5px;"> 9</span><span style="color: #408080; font-style: italic"># b</span>
 <span style="color: #000000; background-color: #f0f0f0; padding-left: 5px; padding-right: 5px;">10</span><span style="color: #408080; font-style: italic"># c</span>
 </pre>
diff --git a/tests/html_linenos_expected_output/inline_nocls_step_1_start_8_special_3_anchor.html b/tests/html_linenos_expected_output/inline_nocls_step_1_start_8_special_3_anchor.html
index 02033946..90f1e9bc 100644
--- a/tests/html_linenos_expected_output/inline_nocls_step_1_start_8_special_3_anchor.html
+++ b/tests/html_linenos_expected_output/inline_nocls_step_1_start_8_special_3_anchor.html
@@ -1,5 +1,5 @@
 <div class="highlight" style="background: #f8f8f8">
- <pre style="line-height: 125%; margin: 0;"><span></span><span style="color: #000000; background-color: #f0f0f0; padding-left: 5px; padding-right: 5px;"> 8</span><span style="color: #408080; font-style: italic"># a</span>
+ <pre style="line-height: 125%;"><span></span><span style="color: #000000; background-color: #f0f0f0; padding-left: 5px; padding-right: 5px;"> 8</span><span style="color: #408080; font-style: italic"># a</span>
 <span style="color: #000000; background-color: #ffffc0; padding-left: 5px; padding-right: 5px;"> 9</span><span style="color: #408080; font-style: italic"># b</span>
 <span style="color: #000000; background-color: #f0f0f0; padding-left: 5px; padding-right: 5px;">10</span><span style="color: #408080; font-style: italic"># c</span>
 </pre>
diff --git a/tests/html_linenos_expected_output/inline_nocls_step_1_start_8_special_3_noanchor.html b/tests/html_linenos_expected_output/inline_nocls_step_1_start_8_special_3_noanchor.html
index 02033946..90f1e9bc 100644
--- a/tests/html_linenos_expected_output/inline_nocls_step_1_start_8_special_3_noanchor.html
+++ b/tests/html_linenos_expected_output/inline_nocls_step_1_start_8_special_3_noanchor.html
@@ -1,5 +1,5 @@
 <div class="highlight" style="background: #f8f8f8">
- <pre style="line-height: 125%; margin: 0;"><span></span><span style="color: #000000; background-color: #f0f0f0; padding-left: 5px; padding-right: 5px;"> 8</span><span style="color: #408080; font-style: italic"># a</span>
+ <pre style="line-height: 125%;"><span></span><span style="color: #000000; background-color: #f0f0f0; padding-left: 5px; padding-right: 5px;"> 8</span><span style="color: #408080; font-style: italic"># a</span>
 <span style="color: #000000; background-color: #ffffc0; padding-left: 5px; padding-right: 5px;"> 9</span><span style="color: #408080; font-style: italic"># b</span>
 <span style="color: #000000; background-color: #f0f0f0; padding-left: 5px; padding-right: 5px;">10</span><span style="color: #408080; font-style: italic"># c</span>
 </pre>
diff --git a/tests/html_linenos_expected_output/inline_nocls_step_2_start_1_special_0_anchor.html b/tests/html_linenos_expected_output/inline_nocls_step_2_start_1_special_0_anchor.html
index 68b376aa..bf4bf25d 100644
--- a/tests/html_linenos_expected_output/inline_nocls_step_2_start_1_special_0_anchor.html
+++ b/tests/html_linenos_expected_output/inline_nocls_step_2_start_1_special_0_anchor.html
@@ -1,5 +1,5 @@
 <div class="highlight" style="background: #f8f8f8">
- <pre style="line-height: 125%; margin: 0;"><span></span><span style="color: #000000; background-color: #f0f0f0; padding-left: 5px; padding-right: 5px;"> </span><span style="color: #408080; font-style: italic"># a</span>
+ <pre style="line-height: 125%;"><span></span><span style="color: #000000; background-color: #f0f0f0; padding-left: 5px; padding-right: 5px;"> </span><span style="color: #408080; font-style: italic"># a</span>
 <span style="color: #000000; background-color: #f0f0f0; padding-left: 5px; padding-right: 5px;">2</span><span style="color: #408080; font-style: italic"># b</span>
 <span style="color: #000000; background-color: #f0f0f0; padding-left: 5px; padding-right: 5px;"> </span><span style="color: #408080; font-style: italic"># c</span>
 </pre>
diff --git a/tests/html_linenos_expected_output/inline_nocls_step_2_start_1_special_0_noanchor.html b/tests/html_linenos_expected_output/inline_nocls_step_2_start_1_special_0_noanchor.html
index 68b376aa..bf4bf25d 100644
--- a/tests/html_linenos_expected_output/inline_nocls_step_2_start_1_special_0_noanchor.html
+++ b/tests/html_linenos_expected_output/inline_nocls_step_2_start_1_special_0_noanchor.html
@@ -1,5 +1,5 @@
 <div class="highlight" style="background: #f8f8f8">
- <pre style="line-height: 125%; margin: 0;"><span></span><span style="color: #000000; background-color: #f0f0f0; padding-left: 5px; padding-right: 5px;"> </span><span style="color: #408080; font-style: italic"># a</span>
+ <pre style="line-height: 125%;"><span></span><span style="color: #000000; background-color: #f0f0f0; padding-left: 5px; padding-right: 5px;"> </span><span style="color: #408080; font-style: italic"># a</span>
 <span style="color: #000000; background-color: #f0f0f0; padding-left: 5px; padding-right: 5px;">2</span><span style="color: #408080; font-style: italic"># b</span>
 <span style="color: #000000; background-color: #f0f0f0; padding-left: 5px; padding-right: 5px;"> </span><span style="color: #408080; font-style: italic"># c</span>
 </pre>
diff --git a/tests/html_linenos_expected_output/inline_nocls_step_2_start_1_special_3_anchor.html b/tests/html_linenos_expected_output/inline_nocls_step_2_start_1_special_3_anchor.html
index 67dc22cb..d198ce0d 100644
--- a/tests/html_linenos_expected_output/inline_nocls_step_2_start_1_special_3_anchor.html
+++ b/tests/html_linenos_expected_output/inline_nocls_step_2_start_1_special_3_anchor.html
@@ -1,5 +1,5 @@
 <div class="highlight" style="background: #f8f8f8">
- <pre style="line-height: 125%; margin: 0;"><span></span><span style="color: #000000; background-color: #f0f0f0; padding-left: 5px; padding-right: 5px;"> </span><span style="color: #408080; font-style: italic"># a</span>
+ <pre style="line-height: 125%;"><span></span><span style="color: #000000; background-color: #f0f0f0; padding-left: 5px; padding-right: 5px;"> </span><span style="color: #408080; font-style: italic"># a</span>
 <span style="color: #000000; background-color: #f0f0f0; padding-left: 5px; padding-right: 5px;">2</span><span style="color: #408080; font-style: italic"># b</span>
 <span style="color: #000000; background-color: #ffffc0; padding-left: 5px; padding-right: 5px;"> </span><span style="color: #408080; font-style: italic"># c</span>
 </pre>
diff --git a/tests/html_linenos_expected_output/inline_nocls_step_2_start_1_special_3_noanchor.html b/tests/html_linenos_expected_output/inline_nocls_step_2_start_1_special_3_noanchor.html
index 67dc22cb..d198ce0d 100644
--- a/tests/html_linenos_expected_output/inline_nocls_step_2_start_1_special_3_noanchor.html
+++ b/tests/html_linenos_expected_output/inline_nocls_step_2_start_1_special_3_noanchor.html
@@ -1,5 +1,5 @@
 <div class="highlight" style="background: #f8f8f8">
- <pre style="line-height: 125%; margin: 0;"><span></span><span style="color: #000000; background-color: #f0f0f0; padding-left: 5px; padding-right: 5px;"> </span><span style="color: #408080; font-style: italic"># a</span>
+ <pre style="line-height: 125%;"><span></span><span style="color: #000000; background-color: #f0f0f0; padding-left: 5px; padding-right: 5px;"> </span><span style="color: #408080; font-style: italic"># a</span>
 <span style="color: #000000; background-color: #f0f0f0; padding-left: 5px; padding-right: 5px;">2</span><span style="color: #408080; font-style: italic"># b</span>
 <span style="color: #000000; background-color: #ffffc0; padding-left: 5px; padding-right: 5px;"> </span><span style="color: #408080; font-style: italic"># c</span>
 </pre>
diff --git a/tests/html_linenos_expected_output/inline_nocls_step_2_start_8_special_0_anchor.html b/tests/html_linenos_expected_output/inline_nocls_step_2_start_8_special_0_anchor.html
index 718b019f..56a09210 100644
--- a/tests/html_linenos_expected_output/inline_nocls_step_2_start_8_special_0_anchor.html
+++ b/tests/html_linenos_expected_output/inline_nocls_step_2_start_8_special_0_anchor.html
@@ -1,5 +1,5 @@
 <div class="highlight" style="background: #f8f8f8">
- <pre style="line-height: 125%; margin: 0;"><span></span><span style="color: #000000; background-color: #f0f0f0; padding-left: 5px; padding-right: 5px;"> 8</span><span style="color: #408080; font-style: italic"># a</span>
+ <pre style="line-height: 125%;"><span></span><span style="color: #000000; background-color: #f0f0f0; padding-left: 5px; padding-right: 5px;"> 8</span><span style="color: #408080; font-style: italic"># a</span>
 <span style="color: #000000; background-color: #f0f0f0; padding-left: 5px; padding-right: 5px;">  </span><span style="color: #408080; font-style: italic"># b</span>
 <span style="color: #000000; background-color: #f0f0f0; padding-left: 5px; padding-right: 5px;">10</span><span style="color: #408080; font-style: italic"># c</span>
 </pre>
diff --git a/tests/html_linenos_expected_output/inline_nocls_step_2_start_8_special_0_noanchor.html b/tests/html_linenos_expected_output/inline_nocls_step_2_start_8_special_0_noanchor.html
index 718b019f..56a09210 100644
--- a/tests/html_linenos_expected_output/inline_nocls_step_2_start_8_special_0_noanchor.html
+++ b/tests/html_linenos_expected_output/inline_nocls_step_2_start_8_special_0_noanchor.html
@@ -1,5 +1,5 @@
 <div class="highlight" style="background: #f8f8f8">
- <pre style="line-height: 125%; margin: 0;"><span></span><span style="color: #000000; background-color: #f0f0f0; padding-left: 5px; padding-right: 5px;"> 8</span><span style="color: #408080; font-style: italic"># a</span>
+ <pre style="line-height: 125%;"><span></span><span style="color: #000000; background-color: #f0f0f0; padding-left: 5px; padding-right: 5px;"> 8</span><span style="color: #408080; font-style: italic"># a</span>
 <span style="color: #000000; background-color: #f0f0f0; padding-left: 5px; padding-right: 5px;">  </span><span style="color: #408080; font-style: italic"># b</span>
 <span style="color: #000000; background-color: #f0f0f0; padding-left: 5px; padding-right: 5px;">10</span><span style="color: #408080; font-style: italic"># c</span>
 </pre>
diff --git a/tests/html_linenos_expected_output/inline_nocls_step_2_start_8_special_3_anchor.html b/tests/html_linenos_expected_output/inline_nocls_step_2_start_8_special_3_anchor.html
index 2884e978..81f314dc 100644
--- a/tests/html_linenos_expected_output/inline_nocls_step_2_start_8_special_3_anchor.html
+++ b/tests/html_linenos_expected_output/inline_nocls_step_2_start_8_special_3_anchor.html
@@ -1,5 +1,5 @@
 <div class="highlight" style="background: #f8f8f8">
- <pre style="line-height: 125%; margin: 0;"><span></span><span style="color: #000000; background-color: #f0f0f0; padding-left: 5px; padding-right: 5px;"> 8</span><span style="color: #408080; font-style: italic"># a</span>
+ <pre style="line-height: 125%;"><span></span><span style="color: #000000; background-color: #f0f0f0; padding-left: 5px; padding-right: 5px;"> 8</span><span style="color: #408080; font-style: italic"># a</span>
 <span style="color: #000000; background-color: #ffffc0; padding-left: 5px; padding-right: 5px;">  </span><span style="color: #408080; font-style: italic"># b</span>
 <span style="color: #000000; background-color: #f0f0f0; padding-left: 5px; padding-right: 5px;">10</span><span style="color: #408080; font-style: italic"># c</span>
 </pre>
diff --git a/tests/html_linenos_expected_output/inline_nocls_step_2_start_8_special_3_noanchor.html b/tests/html_linenos_expected_output/inline_nocls_step_2_start_8_special_3_noanchor.html
index 2884e978..81f314dc 100644
--- a/tests/html_linenos_expected_output/inline_nocls_step_2_start_8_special_3_noanchor.html
+++ b/tests/html_linenos_expected_output/inline_nocls_step_2_start_8_special_3_noanchor.html
@@ -1,5 +1,5 @@
 <div class="highlight" style="background: #f8f8f8">
- <pre style="line-height: 125%; margin: 0;"><span></span><span style="color: #000000; background-color: #f0f0f0; padding-left: 5px; padding-right: 5px;"> 8</span><span style="color: #408080; font-style: italic"># a</span>
+ <pre style="line-height: 125%;"><span></span><span style="color: #000000; background-color: #f0f0f0; padding-left: 5px; padding-right: 5px;"> 8</span><span style="color: #408080; font-style: italic"># a</span>
 <span style="color: #000000; background-color: #ffffc0; padding-left: 5px; padding-right: 5px;">  </span><span style="color: #408080; font-style: italic"># b</span>
 <span style="color: #000000; background-color: #f0f0f0; padding-left: 5px; padding-right: 5px;">10</span><span style="color: #408080; font-style: italic"># c</span>
 </pre>
diff --git a/tests/html_linenos_expected_output/table_nocls_step_1_start_1_special_0_anchor.html b/tests/html_linenos_expected_output/table_nocls_step_1_start_1_special_0_anchor.html
index b672790d..41ea57f3 100644
--- a/tests/html_linenos_expected_output/table_nocls_step_1_start_1_special_0_anchor.html
+++ b/tests/html_linenos_expected_output/table_nocls_step_1_start_1_special_0_anchor.html
@@ -9,7 +9,7 @@
   </td>
   <td class="code">
    <div class="highlight" style="background: #f8f8f8">
-    <pre style="line-height: 125%; margin: 0;"><span></span><span style="color: #408080; font-style: italic"># a</span>
+    <pre style="line-height: 125%;"><span></span><span style="color: #408080; font-style: italic"># a</span>
 <span style="color: #408080; font-style: italic"># b</span>
 <span style="color: #408080; font-style: italic"># c</span>
 </pre>
diff --git a/tests/html_linenos_expected_output/table_nocls_step_1_start_1_special_0_noanchor.html b/tests/html_linenos_expected_output/table_nocls_step_1_start_1_special_0_noanchor.html
index 5f56da29..07ded26c 100644
--- a/tests/html_linenos_expected_output/table_nocls_step_1_start_1_special_0_noanchor.html
+++ b/tests/html_linenos_expected_output/table_nocls_step_1_start_1_special_0_noanchor.html
@@ -9,7 +9,7 @@
   </td>
   <td class="code">
    <div class="highlight" style="background: #f8f8f8">
-    <pre style="line-height: 125%; margin: 0;"><span></span><span style="color: #408080; font-style: italic"># a</span>
+    <pre style="line-height: 125%;"><span></span><span style="color: #408080; font-style: italic"># a</span>
 <span style="color: #408080; font-style: italic"># b</span>
 <span style="color: #408080; font-style: italic"># c</span>
 </pre>
diff --git a/tests/html_linenos_expected_output/table_nocls_step_1_start_1_special_3_anchor.html b/tests/html_linenos_expected_output/table_nocls_step_1_start_1_special_3_anchor.html
index 8ac4aedf..f43e8bb7 100644
--- a/tests/html_linenos_expected_output/table_nocls_step_1_start_1_special_3_anchor.html
+++ b/tests/html_linenos_expected_output/table_nocls_step_1_start_1_special_3_anchor.html
@@ -9,7 +9,7 @@
   </td>
   <td class="code">
    <div class="highlight" style="background: #f8f8f8">
-    <pre style="line-height: 125%; margin: 0;"><span></span><span style="color: #408080; font-style: italic"># a</span>
+    <pre style="line-height: 125%;"><span></span><span style="color: #408080; font-style: italic"># a</span>
 <span style="color: #408080; font-style: italic"># b</span>
 <span style="color: #408080; font-style: italic"># c</span>
 </pre>
diff --git a/tests/html_linenos_expected_output/table_nocls_step_1_start_1_special_3_noanchor.html b/tests/html_linenos_expected_output/table_nocls_step_1_start_1_special_3_noanchor.html
index 5ae241df..6e901af9 100644
--- a/tests/html_linenos_expected_output/table_nocls_step_1_start_1_special_3_noanchor.html
+++ b/tests/html_linenos_expected_output/table_nocls_step_1_start_1_special_3_noanchor.html
@@ -9,7 +9,7 @@
   </td>
   <td class="code">
    <div class="highlight" style="background: #f8f8f8">
-    <pre style="line-height: 125%; margin: 0;"><span></span><span style="color: #408080; font-style: italic"># a</span>
+    <pre style="line-height: 125%;"><span></span><span style="color: #408080; font-style: italic"># a</span>
 <span style="color: #408080; font-style: italic"># b</span>
 <span style="color: #408080; font-style: italic"># c</span>
 </pre>
diff --git a/tests/html_linenos_expected_output/table_nocls_step_1_start_8_special_0_anchor.html b/tests/html_linenos_expected_output/table_nocls_step_1_start_8_special_0_anchor.html
index 4684afd1..2d69b757 100644
--- a/tests/html_linenos_expected_output/table_nocls_step_1_start_8_special_0_anchor.html
+++ b/tests/html_linenos_expected_output/table_nocls_step_1_start_8_special_0_anchor.html
@@ -9,7 +9,7 @@
   </td>
   <td class="code">
    <div class="highlight" style="background: #f8f8f8">
-    <pre style="line-height: 125%; margin: 0;"><span></span><span style="color: #408080; font-style: italic"># a</span>
+    <pre style="line-height: 125%;"><span></span><span style="color: #408080; font-style: italic"># a</span>
 <span style="color: #408080; font-style: italic"># b</span>
 <span style="color: #408080; font-style: italic"># c</span>
 </pre>
diff --git a/tests/html_linenos_expected_output/table_nocls_step_1_start_8_special_0_noanchor.html b/tests/html_linenos_expected_output/table_nocls_step_1_start_8_special_0_noanchor.html
index 9a83ccc9..e9387996 100644
--- a/tests/html_linenos_expected_output/table_nocls_step_1_start_8_special_0_noanchor.html
+++ b/tests/html_linenos_expected_output/table_nocls_step_1_start_8_special_0_noanchor.html
@@ -9,7 +9,7 @@
   </td>
   <td class="code">
    <div class="highlight" style="background: #f8f8f8">
-    <pre style="line-height: 125%; margin: 0;"><span></span><span style="color: #408080; font-style: italic"># a</span>
+    <pre style="line-height: 125%;"><span></span><span style="color: #408080; font-style: italic"># a</span>
 <span style="color: #408080; font-style: italic"># b</span>
 <span style="color: #408080; font-style: italic"># c</span>
 </pre>
diff --git a/tests/html_linenos_expected_output/table_nocls_step_1_start_8_special_3_anchor.html b/tests/html_linenos_expected_output/table_nocls_step_1_start_8_special_3_anchor.html
index 106b9c10..6cd0f9fa 100644
--- a/tests/html_linenos_expected_output/table_nocls_step_1_start_8_special_3_anchor.html
+++ b/tests/html_linenos_expected_output/table_nocls_step_1_start_8_special_3_anchor.html
@@ -9,7 +9,7 @@
   </td>
   <td class="code">
    <div class="highlight" style="background: #f8f8f8">
-    <pre style="line-height: 125%; margin: 0;"><span></span><span style="color: #408080; font-style: italic"># a</span>
+    <pre style="line-height: 125%;"><span></span><span style="color: #408080; font-style: italic"># a</span>
 <span style="color: #408080; font-style: italic"># b</span>
 <span style="color: #408080; font-style: italic"># c</span>
 </pre>
diff --git a/tests/html_linenos_expected_output/table_nocls_step_1_start_8_special_3_noanchor.html b/tests/html_linenos_expected_output/table_nocls_step_1_start_8_special_3_noanchor.html
index 3b5ff80b..12ed3fbd 100644
--- a/tests/html_linenos_expected_output/table_nocls_step_1_start_8_special_3_noanchor.html
+++ b/tests/html_linenos_expected_output/table_nocls_step_1_start_8_special_3_noanchor.html
@@ -9,7 +9,7 @@
   </td>
   <td class="code">
    <div class="highlight" style="background: #f8f8f8">
-    <pre style="line-height: 125%; margin: 0;"><span></span><span style="color: #408080; font-style: italic"># a</span>
+    <pre style="line-height: 125%;"><span></span><span style="color: #408080; font-style: italic"># a</span>
 <span style="color: #408080; font-style: italic"># b</span>
 <span style="color: #408080; font-style: italic"># c</span>
 </pre>
diff --git a/tests/html_linenos_expected_output/table_nocls_step_2_start_1_special_0_anchor.html b/tests/html_linenos_expected_output/table_nocls_step_2_start_1_special_0_anchor.html
index 1928bf33..eee93929 100644
--- a/tests/html_linenos_expected_output/table_nocls_step_2_start_1_special_0_anchor.html
+++ b/tests/html_linenos_expected_output/table_nocls_step_2_start_1_special_0_anchor.html
@@ -9,7 +9,7 @@
   </td>
   <td class="code">
    <div class="highlight" style="background: #f8f8f8">
-    <pre style="line-height: 125%; margin: 0;"><span></span><span style="color: #408080; font-style: italic"># a</span>
+    <pre style="line-height: 125%;"><span></span><span style="color: #408080; font-style: italic"># a</span>
 <span style="color: #408080; font-style: italic"># b</span>
 <span style="color: #408080; font-style: italic"># c</span>
 </pre>
diff --git a/tests/html_linenos_expected_output/table_nocls_step_2_start_1_special_0_noanchor.html b/tests/html_linenos_expected_output/table_nocls_step_2_start_1_special_0_noanchor.html
index ec766bca..b67689b3 100644
--- a/tests/html_linenos_expected_output/table_nocls_step_2_start_1_special_0_noanchor.html
+++ b/tests/html_linenos_expected_output/table_nocls_step_2_start_1_special_0_noanchor.html
@@ -9,7 +9,7 @@
   </td>
   <td class="code">
    <div class="highlight" style="background: #f8f8f8">
-    <pre style="line-height: 125%; margin: 0;"><span></span><span style="color: #408080; font-style: italic"># a</span>
+    <pre style="line-height: 125%;"><span></span><span style="color: #408080; font-style: italic"># a</span>
 <span style="color: #408080; font-style: italic"># b</span>
 <span style="color: #408080; font-style: italic"># c</span>
 </pre>
diff --git a/tests/html_linenos_expected_output/table_nocls_step_2_start_1_special_3_anchor.html b/tests/html_linenos_expected_output/table_nocls_step_2_start_1_special_3_anchor.html
index 1f30d5ce..11a44446 100644
--- a/tests/html_linenos_expected_output/table_nocls_step_2_start_1_special_3_anchor.html
+++ b/tests/html_linenos_expected_output/table_nocls_step_2_start_1_special_3_anchor.html
@@ -9,7 +9,7 @@
   </td>
   <td class="code">
    <div class="highlight" style="background: #f8f8f8">
-    <pre style="line-height: 125%; margin: 0;"><span></span><span style="color: #408080; font-style: italic"># a</span>
+    <pre style="line-height: 125%;"><span></span><span style="color: #408080; font-style: italic"># a</span>
 <span style="color: #408080; font-style: italic"># b</span>
 <span style="color: #408080; font-style: italic"># c</span>
 </pre>
diff --git a/tests/html_linenos_expected_output/table_nocls_step_2_start_1_special_3_noanchor.html b/tests/html_linenos_expected_output/table_nocls_step_2_start_1_special_3_noanchor.html
index 3e5af045..eecace44 100644
--- a/tests/html_linenos_expected_output/table_nocls_step_2_start_1_special_3_noanchor.html
+++ b/tests/html_linenos_expected_output/table_nocls_step_2_start_1_special_3_noanchor.html
@@ -9,7 +9,7 @@
   </td>
   <td class="code">
    <div class="highlight" style="background: #f8f8f8">
-    <pre style="line-height: 125%; margin: 0;"><span></span><span style="color: #408080; font-style: italic"># a</span>
+    <pre style="line-height: 125%;"><span></span><span style="color: #408080; font-style: italic"># a</span>
 <span style="color: #408080; font-style: italic"># b</span>
 <span style="color: #408080; font-style: italic"># c</span>
 </pre>
diff --git a/tests/html_linenos_expected_output/table_nocls_step_2_start_8_special_0_anchor.html b/tests/html_linenos_expected_output/table_nocls_step_2_start_8_special_0_anchor.html
index cb8a88d0..576a524c 100644
--- a/tests/html_linenos_expected_output/table_nocls_step_2_start_8_special_0_anchor.html
+++ b/tests/html_linenos_expected_output/table_nocls_step_2_start_8_special_0_anchor.html
@@ -9,7 +9,7 @@
   </td>
   <td class="code">
    <div class="highlight" style="background: #f8f8f8">
-    <pre style="line-height: 125%; margin: 0;"><span></span><span style="color: #408080; font-style: italic"># a</span>
+    <pre style="line-height: 125%;"><span></span><span style="color: #408080; font-style: italic"># a</span>
 <span style="color: #408080; font-style: italic"># b</span>
 <span style="color: #408080; font-style: italic"># c</span>
 </pre>
diff --git a/tests/html_linenos_expected_output/table_nocls_step_2_start_8_special_0_noanchor.html b/tests/html_linenos_expected_output/table_nocls_step_2_start_8_special_0_noanchor.html
index 758a577c..f29ea4bf 100644
--- a/tests/html_linenos_expected_output/table_nocls_step_2_start_8_special_0_noanchor.html
+++ b/tests/html_linenos_expected_output/table_nocls_step_2_start_8_special_0_noanchor.html
@@ -9,7 +9,7 @@
   </td>
   <td class="code">
    <div class="highlight" style="background: #f8f8f8">
-    <pre style="line-height: 125%; margin: 0;"><span></span><span style="color: #408080; font-style: italic"># a</span>
+    <pre style="line-height: 125%;"><span></span><span style="color: #408080; font-style: italic"># a</span>
 <span style="color: #408080; font-style: italic"># b</span>
 <span style="color: #408080; font-style: italic"># c</span>
 </pre>
diff --git a/tests/html_linenos_expected_output/table_nocls_step_2_start_8_special_3_anchor.html b/tests/html_linenos_expected_output/table_nocls_step_2_start_8_special_3_anchor.html
index 28b947c9..30ac581b 100644
--- a/tests/html_linenos_expected_output/table_nocls_step_2_start_8_special_3_anchor.html
+++ b/tests/html_linenos_expected_output/table_nocls_step_2_start_8_special_3_anchor.html
@@ -9,7 +9,7 @@
   </td>
   <td class="code">
    <div class="highlight" style="background: #f8f8f8">
-    <pre style="line-height: 125%; margin: 0;"><span></span><span style="color: #408080; font-style: italic"># a</span>
+    <pre style="line-height: 125%;"><span></span><span style="color: #408080; font-style: italic"># a</span>
 <span style="color: #408080; font-style: italic"># b</span>
 <span style="color: #408080; font-style: italic"># c</span>
 </pre>
diff --git a/tests/html_linenos_expected_output/table_nocls_step_2_start_8_special_3_noanchor.html b/tests/html_linenos_expected_output/table_nocls_step_2_start_8_special_3_noanchor.html
index bd9056e6..a2ca8b8b 100644
--- a/tests/html_linenos_expected_output/table_nocls_step_2_start_8_special_3_noanchor.html
+++ b/tests/html_linenos_expected_output/table_nocls_step_2_start_8_special_3_noanchor.html
@@ -9,7 +9,7 @@
   </td>
   <td class="code">
    <div class="highlight" style="background: #f8f8f8">
-    <pre style="line-height: 125%; margin: 0;"><span></span><span style="color: #408080; font-style: italic"># a</span>
+    <pre style="line-height: 125%;"><span></span><span style="color: #408080; font-style: italic"># a</span>
 <span style="color: #408080; font-style: italic"># b</span>
 <span style="color: #408080; font-style: italic"># c</span>
 </pre>
diff --git a/tests/test_html_formatter.py b/tests/test_html_formatter.py
index 37556777..0e2fab7a 100644
--- a/tests/test_html_formatter.py
+++ b/tests/test_html_formatter.py
@@ -142,7 +142,7 @@ def test_valid_output():
 
 def test_get_style_defs_contains_pre_style():
     style_defs = HtmlFormatter().get_style_defs().splitlines()
-    assert style_defs[0] == 'pre { line-height: 125%; margin: 0; }'
+    assert style_defs[0] == 'pre { line-height: 125% }'
 
 
 def test_get_style_defs_contains_default_line_numbers_styles():