lsp: FIx indentation inconsistency and multi-word keyword completion repetition bug

[TheBearodactyl]

This PR:

1. Makes the formatter use 2 spaces instead of 4 to match the tree-sitter indentation
2. Fixes completion repetition on typing past the first word in a multi-word keyword (e.g. completing in p as opposed to in results in in in property where it should result in in property)

The new function in completion.rs could probably be smaller which is why I'm opening this as a draft

[TheBearodactyl]

Before:

2025-07-22.20-08-10.mp4

After:

2025-07-22.20-08-50.mp4

[TheBearodactyl]

forgot to update the tests, one sec

[hunger]

This is vim/nvim I assume? I think VSCode and helix both work fine with 4 spaces, so we should fix the tree-sitter based indentation in vim :-) And it would unbreak many of the failing tests, too:-)

I do like your completion suggestion a lot though!

[TheBearodactyl]

This is vim/nvim I assume? I think VSCode and helix both work fine with 4 spaces, so we should fix the tree-sitter based indentation in vim :-) And it would unbreak many of the failing tests, too:-)

I do like your completion suggestion a lot though!

oh i already fixed all but 3 of the tests

[TheBearodactyl]

i can definitely revert them though

[TheBearodactyl]

[TheBearodactyl]

also i might fix it to not remove newlines as well since removing them makes the code too compact