No way to tell what `H' (a minor mode) in the mode line means

[Eric Hanchrow]

In GNU Emacs 21.1.1 (i686-pc-linux-gnu, X toolkit, Xaw3d scroll bars)
 of 2001-11-14 on slop.vhcorp.com
Important settings:
  value of $LC_ALL: nil
  value of $LC_COLLATE: nil
  value of $LC_CTYPE: nil
  value of $LC_MESSAGES: nil
  value of $LC_MONETARY: nil
  value of $LC_NUMERIC: nil
  value of $LC_TIME: nil
  value of $LANG: nil
  locale-coding-system: iso-latin-1
  default-enable-multibyte-characters: nil

Please describe exactly what actions triggered the bug
and the precise symptoms of the bug:

I turned on hi-lock mode with (hi-lock-mode 1), and then forgot that I
did so.

I then noticed that every buffer's mode line had an `H' in the area
that shows the minor modes in use.  For example, a text-mode buffer's
mode line said

        (Text H Fill)

The `H' was a mystery -- I didn't know what it meant, nor how it got
there, nor how to disable whatever minor mode put it there.

So the bug is that there's no way for me to figure out what it means.
I tried hovering the mouse over the `H', but nothing happened -- it'd
be nice if a little tooltip window (or whatever they're called) came
up and said "hi-lock mode"; that'd have been all I'd needed.  I had to
`grep' all the Emacs Lisp sources in order to figure out who put that
`H' there.

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