Add Zenburn theme

[sirex]

Zenburn theme home page: https://kippura.org/zenburnpage/

And Vim Zenburn theme repository, from which I took color codes: https://github.com/jnurmine/Zenburn

[sirex]

pygmentize -f html -O style=zenburn,full,linenos=True,hl_lines=9 test.py -o test.html

[Anteru]

Thanks! There are only two more colors missing, for special line numbers. You can test that with linenospecial=2, the color names are line_number_special_color and line_number_special_background_color. Those are used to highlight every N-th line, so you probably want something a tad brighter for them.

[Anteru]

Please add colors for the _special_ variant as well.

[sirex]

Added _spcial_ colors for line numbers. But something does not work with HTML generator, because just by adding linenospecial=2 does not work. It only worked for me by also adding noclasses=True. It seems, that generated HTML and CSS styles does not line up.

pygmentize -f html -O style=zenburn,full,linenos=True,linenospecial=2,noclasses=True,hl_lines=9 test.py -o /tmp/test.html

[paw-lu]

Thanks @sirex! I was going in circles trying to figure out why the special formatting wasn't applying. Thanks for documenting your temporary solution.

[Anteru]

The class issue is fixed in #1701, I think. Thanks for your contribution!