This makes Tab and Enter act identical by default for autocompletion.
If Shift is held, the suggestion is added in-place without the word
being replaced. This matches the behavior found in Visual Studio Code
where the following occurs:
- Pressing Tab accepts the suggestion and replaces the word.
- Pressing Enter accepts the suggestion and replaces the word.
- Pressing Shift + Tab accepts the suggestion and doesn't replace the word.
- Pressing Shift + Enter accepts the suggestion and doesn't replace the word.