Problem:
- Help tags provide a good way to navigate the Vim documentation, but
many help documents don't use them effectively. I think one of the
reasons is that help writers have to look up help tags manually with
`:help` command, which is not very convenient.
- 'iskeyword' is only set for help buffers opened by `:help` command.
That means if I'm editing a help file, I cannot jump to tag in same
file using `Ctrl-]` unless I manually set it, which is annoying.
Solution:
- Add omni completion for Vim help tags.
- Set 'iskeyword' for `ft-help`
closes: vim/vim#170730b540c6f38
Co-authored-by: Christian Brabandt <cb@256bit.org>
f908fe4462
