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-rw-r--r--sphinx/directives/code.py2
1 files changed, 1 insertions, 1 deletions
diff --git a/sphinx/directives/code.py b/sphinx/directives/code.py
index 5859f359a..2d3c87be9 100644
--- a/sphinx/directives/code.py
+++ b/sphinx/directives/code.py
@@ -58,7 +58,7 @@ class Highlight(SphinxDirective):
def dedent_lines(lines: List[str], dedent: int, location: Tuple[str, int] = None) -> List[str]:
if dedent is None:
- return textwrap.dedent(''.join(lines)).splitlines(True)
+ return textwrap.dedent('\n'.join(lines)).split('\n')
if any(s[:dedent].strip() for s in lines):
logger.warning(__('non-whitespace stripped by dedent'), location=location)