[rexx] highlight [options] file
If file has a .md or a .html extension,
process all Rexx fenced code blocks
in FILE and highlight them.
Otherwise, we assume that this is a Rexx file,
and we highlight it directly.
-a, --ansi Select ANSI SGR terminal highlighting
-h, --html Select HTML highlighting
-l, --latex Select LaTeX highlighting
--noprolog Don't print a prolog
-n, --numberlines Print line numbers
--patch=patches Apply the semicolon-separated list of patches.
--patchfile=file Apply the patches contained in file.
--prolog Print a prolog (LaTeX driver only)
--startFrom=n Start line numbers at n.
-s, --style=style Use the rexx-style.css style sheet
--tutor Enable TUTOR-flavored Unicode
-u , --unicode Enable TUTOR-flavored Unicode
-w, --width=n Ensure that lines have width n (ANSI only)