Better hi parsing

[pointlessone]

Previous code set some expectations on the highlight command output which not
always are true. It exptected ctermbg to be exactly 3 chars long and guibg
to be exactly 7 chars long. This is not true for many cases. Here's for example
my SingColumn:

SignColumn     xxx term=standout ctermfg=11 ctermbg=8 guifg=Cyan guibg=Grey

New code sets a different sets of expectations that might be a bit better. New
code relies on the normalized output of highlight command. It parses output
and takes the part from "=" to the first space. This should cover the case of
varying length of numeric colours as well as named colours.

[akiomik]

Thanks!

I merged other pull requset #16 now.
The hi parsing is changed to:

let ctermbg_str = matchstr(sign_col, 'ctermbg=\d')

I think I prefer this one. What do you think?

[pointlessone]

Indeed, this looks easier. Though, according to documentation ctermbg accepts named colours so it won't work at least for some valid values.

[akiomik]

The highlight command accepts named color or indexed color when it set colors, but it shows indexed color when it outputs colors.

:hi Comment ctermbg=Cyan
:hi Comment
" => Comment xxx ctermbg=14

As for ctermbg, I want to let the code of master banch alone.
But, as for guibg, it looks like highlight command outputs hex color or named color, so I think your code is better than my code.

:hi Comment guibg=Blue
:hi Comment
" => Comment xxx guibg=Blue

:hi Comment guibg=#0000FF
:hi Comment
" => Comment xxx guibg=#0000FF

In order to merge automatically, can you reset only ctermbg code?