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-rw-r--r--sphinx/ext/coverage.py2
1 files changed, 1 insertions, 1 deletions
diff --git a/sphinx/ext/coverage.py b/sphinx/ext/coverage.py
index c4078a928..76b721adf 100644
--- a/sphinx/ext/coverage.py
+++ b/sphinx/ext/coverage.py
@@ -100,7 +100,7 @@ class CoverageBuilder(Builder):
# Fetch all the info from the header files
c_objects = self.env.domaindata['c']['objects']
for filename in self.c_sourcefiles:
- undoc = set()
+ undoc = set() # type: Set[Tuple[unicode, unicode]]
with open(filename, 'r') as f:
for line in f:
for key, regex in self.c_regexes: