doc: config, tell readers of git help --config

PhilipOakley · gitster · commit ae578de926ef · 2021-09-13T14:51:07.000-07:00
The `git help` command gained the ability to list config variables in 3ac68a9 (help: add --config to list all available config, 2018-05-26) but failed to tell readers of the config documenation itself. Provide that cross reference. Signed-off-by: Philip Oakley <philipoakley@iee.email> Signed-off-by: Junio C Hamano <gitster@pobox.com>
diff --git a/Documentation/git-config.txt b/Documentation/git-config.txt
@@ -71,6 +71,9 @@ codes are:
 
 On success, the command returns the exit code 0.
 
+A list of all available configuration variables can be obtained using the
+`git help --config` command.
+
 [[OPTIONS]]
 OPTIONS
 -------
