git.txt: add missing info about --git-dir command-line option

Unlike other environment variables (e.g. GIT_WORK_TREE,	GIT_NAMESPACE),
the Documentation/git.txt file did not mention that the GIT_DIR
environment variable can also be set using the --git-dir command line
option.

Signed-off-by: Manlio Perillo <manlio.perillo@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/Documentation/git.txt b/Documentation/git.txt
index e643683b3aa3e8772083bd7ee0add76fd628b74d..60db2929b58deff9cf9c0bf5f9539aad1a0c5a40 100644 (file)
--- a/Documentation/git.txt
+++ b/Documentation/git.txt
@@ -650,6 +650,7 @@ git so take care if using Cogito etc.
        If the 'GIT_DIR' environment variable is set then it
        specifies a path to use instead of the default `.git`
        for the base of the repository.
+       The '--git-dir' command-line option also sets this value.
 
 'GIT_WORK_TREE'::
        Set the path to the working tree.  The value will not be