htag.pl is a sigmonster. It is designed to be extendable in many different ways through its use of
plugins. It might be getting a little bit too sentient in its old age though.
It can be used like this:
htag.pl -m $1
$EDITOR $1
For information on configuration see the sample.htrc file
To create signature files, it is tedious to have to work out what will and won't line up. This is why
the -f option exists. Feed it a sigfile and it will replace the @[0-9]+[RC]?@ bits with required number
of spaces so you can see if you got it right or not. (You could even run it from your favourite editor
e.g. ":! htag.pl -f %" for vim on the current file.)