git-completion.bash's parsing of the command name relies on everything
preceding it starting with '-' unless it is the "-c" option. This
allows users to use the stuck form of "--work-tree=<path>" and
"--namespace=<path>" but not the unstuck forms "--work-tree <path>" and
"--namespace <path>". Fix this.
Similarly, the completion only handles the stuck form "--git-dir=<path>"
and not "--git-dir <path>", so fix this as well.
Signed-off-by: John Keeping <john@keeping.me.uk> Acked-by: SZEDER Gábor <szeder@ira.uka.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>