Re: suppressing copyright.el

[Richard Stallman]

    Is it a better method to:

      (1) copyright.el test whether (eq major-mode 'diff-mode)

    or

      (2) add a variable in copyright.el like `suppress-copyright-update', which
          is make-variable-buffer-local and defaults to nil, and then change
          diff-mode to set it to t

    ?

    I'd guess the latter, but ...

Of the two, the latter seems cleaner to me.  But I have another idea.

copyright.el could have a variable whose value is a list of major
modes to be inactive in.  It could also turn off if the current major
mode is derived from any mode named in that list.