Mention the [user@] part in documentation of ssh:// urls.

Signed-off-by: Yakov Lerner <iler.ml@gmail.com>
Signed-off-by: Junio C Hamano <junkio@cox.net>

Documentation/urls.txt

@@ -10,9 +10,9 @@ to name the remote repository:
 - https://host.xz/path/to/repo.git/
 - git://host.xz/path/to/repo.git/
 - git://host.xz/~user/path/to/repo.git/
-- ssh://host.xz/path/to/repo.git/
-- ssh://host.xz/~user/path/to/repo.git/
-- ssh://host.xz/~/path/to/repo.git
+- ssh://[user@]host.xz/path/to/repo.git/
+- ssh://[user@]host.xz/~user/path/to/repo.git/
+- ssh://[user@]host.xz/~/path/to/repo.git
 ===============================================================
 
 SSH Is the default transport protocol and also supports an