diff -r 9724f8f8850b -r 57c6c24b9bc4 mercurial/context.py
--- a/mercurial/context.py	Tue Aug 21 02:41:20 2012 +0200
+++ b/mercurial/context.py	Tue Aug 21 02:41:20 2012 +0200
@@ -237,8 +237,8 @@
 
     def extinct(self):
         """True if the changeset is extinct"""
-        # We should just compute a cache a check against it.
-        # see revset implementation for details
+        # We should just compute a cache and check against it.
+        # See revset implementation for details.
         #
         # But this naive implementation does not require cache
         if self.phase() <= phases.public: