I would like vim to color "long" lines for me. Using 80 columns as an example, I would like to highlight lines that exceed that length. Here is roughly what I think the .vimrc file should contain, although it (1) doesn't work, and (2) uses Perl's regex syntax to illustrate my point, because I don't know Vim's well enough:
...
highlight Excess ctermbg=0
au Syntax * syn match Excess /.{80,}$/
...
This (in my mind at least) should mark lines that exceed 80 columns. What I would ideally like is the ability to color only the part of the line that exceeds 80 columns, so if a line is 85 columns, then the 81st through the 85th columns would be highlighted.
I'm sure Vim can do this, just not with me at the helm.