diff -r ee64e677c3cf -r 6864c405f023 mercurial/match.py
--- a/mercurial/match.py	Thu Nov 30 15:48:42 2017 -0500
+++ b/mercurial/match.py	Thu Nov 30 22:32:13 2017 +0900
@@ -305,9 +305,6 @@
         Returns the string 'all' if the given directory and all subdirectories
         should be visited. Otherwise returns True or False indicating whether
         the given directory should be visited.
-
-        This function's behavior is undefined if it has returned False for
-        one of the dir's parent directories.
         '''
         return True