bug#48798: 26.3; `define-minor-mode': Message should name the current buffer where enabled/disabled

[Drew Adams]

In case the argument wasn't sufficiently
persuasive, please consider this:

When you load a Lisp file, including when you
just load the file that's visited in the current
buffer (i.e., `M-x load-file RET'), Emacs always
tells you which file was loaded:

 Loading /some/directory/foobar.el (source)...done

Now imagine that Emacs wasn't so helpful, but
just echoed this each time:

  Loading current file...done

or

  Loading file visited in current buffer...done

Emacs can do better for minor-mode toggling also.