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-rw-r--r--python/firstheader.py2
1 files changed, 1 insertions, 1 deletions
diff --git a/python/firstheader.py b/python/firstheader.py
index 06e28958..1a3cadfd 100644
--- a/python/firstheader.py
+++ b/python/firstheader.py
@@ -15,7 +15,7 @@ argp.add_argument("--autofix", action="store_const", const=True)
argp.add_argument("--warn-empty", action="store_const", const=True)
argp.add_argument("--pipe", action="store_const", const=True)
-include_re = re.compile('^#\s*include\s+["<]([^ ">]+)[">]', re.M)
+include_re = re.compile(r'^#\s*include\s+["<]([^ ">]+)[">]', re.M)
ignore = [
lambda fn: fn.startswith("tools/"),