files-backend: don't rewrite the `packed-refs` file unnecessarily

diff --git a/Documentation/git-branch.txt b/Documentation/git-branch.txt
index 81bd0a7b7741f175cf7a99e2aa9cbcacf42da78e..d0b33587717a198655164f5dd5e35e116a8a30e0 100644 (file)
--- a/Documentation/git-branch.txt
+++ b/Documentation/git-branch.txt
@@ -267,8 +267,8 @@ start-point is either a local or remote-tracking branch.
        Only list branches of the given object.
 
 --format <format>::
-       A string that interpolates `%(fieldname)` from the object
-       pointed at by a ref being shown.  The format is the same as
+       A string that interpolates `%(fieldname)` from a branch ref being shown
+       and the object it points at.  The format is the same as
        that of linkgit:git-for-each-ref[1].
 
 Examples