Complete left with right always.

[jojo2357]

Fix #3486

How to test this pull request

$\lflo<caret> $

then hit tab for lfloor

Works on its own, still trying to figure out how to get the case of

$\lfloo<caret>$

and typing r to complete

[jojo2357]

So to tackle #3493 need to edit LatexTypedHandler. But how do we check for non-matched things like \lfloor? because typing the r would probably need to trigger it?

Im not sure how we are going to handle this and prevent a bunch of false positives

[PHPirates]

Thanks, agree with this change! I just added a test, which passes.

As to #3493, maybe it would be nicest to work with LatexPairedBraceMatcher, but that might require some changes in the lexer (as the \left. things would need to be a separate tokentype I think). Doing this manually with a typed handler would be difficult.

[jojo2357]

I think a lexer improvement would be in order to make all the paired commands easily matchable?

I thinks its fine to merge this w/o fixing #3493 I also updated its title to be more technically on the nose

[PHPirates]

Yes, I'm just not sure if editing the lexer would break something else