For spaces (includes tabs) that would be \s
, some others can be matched with character classes (e.g. [[:cntrl:]]
). Extraction of the first parameter of :highlight
should be improved to allow space characters. I noticed this before, but couldn't think of a case where it would matter.
And also \x
sequence might need to be added to allow specifying arbitrary characters via :execute
, because regular expressions don't provide all ASCII table.