Looked up `abbrev-mode` and that is a correct analogy. Abbrev mode also handles emojis, pretty cool. But then it's Emacs so I shouldn't be surprised. Offtopic,

Looked up `abbrev-mode` and that is a correct analogy. Abbrev mode also handles emojis, pretty cool. But then it's Emacs so I shouldn't be surprised. Offtopic, I wish my younger self followed RTFM when I used to use Emacs.