Documentation Suggestions

[aspell-helper]

From Benno Schulenberg via aspell-devel:

Then something I've wanted to report since a long time: most
tools allow one to bundle the short options, but aspell doesn't.
...
So, it would be good if the manual said that short options
may not be concatenated.

And it would be nice if the manual said something about the
exit status of aspell. That it is zero when no error occurred.

Whether spelling corrections were made or not cannot be seen
in the exit status.