git grep: Add "-z/--null" option as in GNU's grep.

diff --git a/Documentation/git-submodule.txt b/Documentation/git-submodule.txt
index abbd5b72de5a993819dff3e3e8fe8aa9516b956b..babaa9bc46a404c4610abc4e4c4281b6c5c5ea6c 100644 (file)
--- a/Documentation/git-submodule.txt
+++ b/Documentation/git-submodule.txt
@@ -15,6 +15,7 @@ SYNOPSIS
 'git submodule' [--quiet] update [--init] [--] [<path>...]
 'git submodule' [--quiet] summary [--summary-limit <n>] [commit] [--] [<path>...]
 'git submodule' [--quiet] foreach <command>
+'git submodule' [--quiet] sync [--] [<path>...]
 
 
 DESCRIPTION
@@ -139,6 +140,14 @@ foreach::
 As an example, "git submodule foreach 'echo $path `git rev-parse HEAD`' will
 show the path and currently checked out commit for each submodule.
 
+sync::
+       Synchronizes submodules' remote URL configuration setting
+       to the value specified in .gitmodules.  This is useful when
+       submodule URLs change upstream and you need to update your local
+       repositories accordingly.
++
+"git submodule sync" synchronizes all submodules while
+"git submodule sync -- A" synchronizes submodule "A" only.
 
 OPTIONS
 -------