This commit addresses the following issues:
* highlight trailing space characters with the `meta` face, instead of
`PrimarySelection`
* make the regex more readable by using a capture group in stead of
`\K`
* specifically match space characters, not other horizontal whitespace
characters
* match two or more space characters
Reference[1]:
> When you do want to insert a <br /> break tag using Markdown, you
> end a line with two or more spaces, then type return.
[1] https://daringfireball.net/projects/markdown/syntax#p
Note that the original reproducer doesn't seem to work anymore,
probably because of changes made to how lists are highlighted.
Fixes#911
This commit removes declarations and mentions to the built-in `bold`
and `italic` faces.
While they could be a user-friendly way of customising how tokens
are emphasised in Markdown documents (similarly to the
`$LESS_TERMCAP_*` environment variables for `man` pagers), most other
markup languages do not have the concept of "strong" and "emphasis"
but refer directly to the font style/weight.
The faces were also not even set by default to highlight as their
names implied, so having markup language support scripts directly
use the +b and +i face attributes is more consistent.
This commit allows using the <semicolon> expansion in commands, instead
of `\;`.
It makes commands look more elegant, and prevents new-comers from
falling into the trap of using <a-;> without escaping the semicolon.
