Add flex

[gs-101]

Flex

This aggressive completion style, also known as flx or fuzzy or scatter completion, attempts to complete using in-order substrings. For example, it can consider ‘foo’ to match ‘frodo’ or ‘fbarbazoo’.

It's a built-in completion style.

[jcs090218]

I'm not sure about this. 🤔

flex is a completion style built-in to Emacs, but it isn't an individual package.

[gs-101]

Oh, I see it now, the built-in components of this list are individual packages. Feel free to close this one (I didn't close it with this comment because maybe you could reconsider, or someone else could make a comment on this).

[jcs090218]

I'll close this now since I haven't seen another item in the list similar to this "partial package" thing. 🤔

Don't worry if other people chime in and would like to add this to the list. We can talk more about this. :)