Requested by Jens Rehsack in PR 39543.
Pod::Spell is a Pod formatter whose output is good for spellchecking.
Pod::Spell rather like Pod::Text, except that it doesn't put much effort
into actual formatting, and it suppresses things that look like Perl symbols
or Perl jargon (so that your spellchecking program won't complain about
mystery words like "$thing" or "Foo::Bar" or "hashref").
