submodule: don't pass empty string arguments to submodule--helper clone

diff --git a/Documentation/git-push.txt b/Documentation/git-push.txt
index 32482cec42d3ea5661813097919ff38657c2e01c..669a357c81fbba17c245adc3660cdd07479e564e 100644 (file)
--- a/Documentation/git-push.txt
+++ b/Documentation/git-push.txt
@@ -277,6 +277,13 @@ origin +master` to force a push to the `master` branch). See the
        default is --verify, giving the hook a chance to prevent the
        push.  With --no-verify, the hook is bypassed completely.
 
+-4::
+--ipv4::
+       Use IPv4 addresses only, ignoring IPv6 addresses.
+
+-6::
+--ipv6::
+       Use IPv6 addresses only, ignoring IPv4 addresses.
 
 include::urls-remotes.txt[]