[PATCH 3 of 4] icasefs: rewrite comment to explain situtation precisely

[FUJIWARA Katsunori]

# HG changeset patch
# User FUJIWARA Katsunori <foozy at lares.dti.ne.jp>
# Date 1324655526 -32400
# Node ID 3bcfea777efc41c87918c1bb594615ff4fb6a34b
# Parent  1dd60426b0611d23db184a8210b56ccbb6c3ea9d
icasefs: rewrite comment to explain situtation precisely

diff -r 1dd60426b061 -r 3bcfea777efc mercurial/util.py
--- a/mercurial/util.py	Sat Dec 24 00:51:14 2011 +0900
+++ b/mercurial/util.py	Sat Dec 24 00:52:06 2011 +0900
@@ -646,7 +646,8 @@
 
         found = find(part, contents)
         if not found:
-            # retry once for the corner case: add files after dir walking
+            # retry "once per directory" per "dirstate.walk" which
+            # may take place for each patches of "hg qpush", for example
             contents = os.listdir(dir)
             _fspathcache[dir] = contents
             found = find(part, contents)