Respect extra parameters for man fallback about info.vim

[HiPhish]

I don't think `:Man` is supposed to work like that. For me `:Man git init` open the page `runit-init(8)`; it probably runs `man init`, which happens to open `git-init(1)` on your system.

[xeruf]

I think :Man forwards all params to the man command as it should, while :Info seems to only forward the first parameter.
man init shows the systemd init page for me, while man git init shows the git-init(1) page. It has always worked that way in my experience.

[xeruf]

However, when I run something like man nonsense init, it shows the result for init, so your result is also expected.