Documentation
highlight :: RegexLike r String => r -> Attr -> FormatterSource
A highlight formatter takes a regular expression used to scan the
text and an attribute to assign to matches. The regular expression
is only applied to individual string tokens (individual words,
whitespace strings, etc.); it is NOT applied to whole lines,
paragraphs, or text spanning multiple lines. If you have need of
that kind of functionality, apply your own attributes with your own
regular expression prior to calling setTextWithAttrs
.