use tokenize.open to avoid incorrect line endings at beginning of file

2 files changed, 5 insertions, 4 deletions

diff --git a/pycodestyle.py b/pycodestyle.py
index 17fac7a..2f4313f 100755
--- a/pycodestyle.py
+++ b/pycodestyle.py
@@ -1814,10 +1814,8 @@ else:
     def readlines(filename):
         """Read the source code."""
         try:
-            with open(filename, 'rb') as f:
-                (coding, lines) = tokenize.detect_encoding(f.readline)
-                f = TextIOWrapper(f, coding, line_buffering=True)
-                return [line.decode(coding) for line in lines] + f.readlines()
+            with tokenize.open(filename) as f:
+                return f.readlines()
         except (LookupError, SyntaxError, UnicodeError):
             # Fall back if file encoding is improperly declared
             with open(filename, encoding='latin-1') as f:
diff --git a/testsuite/crlf.py b/testsuite/crlf.py
new file mode 100644
index 0000000..41f0d0f
--- /dev/null
+++ b/testsuite/crlf.py
@@ -0,0 +1,3 @@
+'''\

+test

+'''