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-rw-r--r--coverage/files.py4
1 files changed, 3 insertions, 1 deletions
diff --git a/coverage/files.py b/coverage/files.py
index c9afefd8..154954d6 100644
--- a/coverage/files.py
+++ b/coverage/files.py
@@ -293,7 +293,9 @@ class PathAliases(object):
in the alias.
Returns:
- The mapped path. This is always a canonical filename.
+ The mapped path. If a mapping has happened, this is a
+ canonical path. If no mapping has happened, it is the
+ original value of `path` unchanged.
"""
for regex, result, pattern_sep, result_sep in self.aliases: