I have two spelling addition files:
~/.vim/bundle/work is in my 'runtimepath'.
I can run this script to build .spl files for both .add files:
mkspell! ~/.vim/spell/en.utf-8.add mkspell! ~/.vim/bundle/work/spell/en.utf-8.add
Without modifying 'spellfile', vim loads both en.utf-8.add.spl and detects words from both files.
Is there a command I can use to build the .spl files for all detected .add files (without having to list them all)?