Documentation: Update information about <format> in git-for-each-ref

Update information about value of <format> used when it is left
unspecified.  Add information about `%%` and `%xx` interpolation
(URL encoding).

Signed-off-by: Jakub Narebski <jnareb@gmail.com>
Signed-off-by: Junio C Hamano <junkio@cox.net>

diff --git a/Documentation/git-for-each-ref.txt b/Documentation/git-for-each-ref.txt
index d5fdcef8d9e60d061ed83a8388ad1d3d0a47e6a5..4af1ebf5dd462fed30bf56b709cdedb47f4a7151 100644 (file)
--- a/Documentation/git-for-each-ref.txt
+++ b/Documentation/git-for-each-ref.txt
@@ -38,7 +38,11 @@ OPTIONS
        is prefixed with an asterisk (`*`) and the ref points
        at a tag object, the value for the field in the object
        tag refers is used.  When unspecified, defaults to
-       `%(refname)`.
+       `%(objectname) SPC %(objecttype) TAB %(refname)`.
+       It also interpolates `%%` to `%`, and `%xx` where `xx`
+       are hex digits interpolates to character with hex code
+       `xx`; for example `%00` interpolates to `\0` (NUL),
+       `%09` to `\t` (TAB) and `%0a` to `\n` (LF).
 
 <pattern>::
        If given, the name of the ref is matched against this