changelog: update read pending documentation
The pending index contains a full copy of the index + in-transaction data. We
replace "extend" with "overwrite" to make this clearer.
--- a/mercurial/changelog.py Sun Jul 15 12:43:10 2012 -0400
+++ b/mercurial/changelog.py Fri Jul 17 15:53:56 2015 +0200
@@ -269,7 +269,7 @@
access its content.
This function will read all the index data out of the pending file and
- extend the main index."""
+ overwrite the main index."""
if not self.opener.exists(file):
return # no pending data for changelog