- Allow flyspell-correct-* packages to be disabled by the end-user
without breaking errors.
- Tie proselint detection to flycheck (which is what uses it)
* Previously, a user could not choose which spell checker to use.
Instead, the first one found was used.
* This PR adds the flags `+aspell` and `+hunspell` which allow a user to
choose which spellchcker to use (even if both are installed).
* Report an error if spell checking is enabled but no spell checker
is found.
+ Make flyspell more selective about what to scan in markdown buffers.
+ Don't mark duplicates when proseline or langtool are present.
+ Add set-flyspell-predicate! for seeing mode-specific word predicates.
