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This PR adds some very basic document formatting as described in #42. Trailing whitespace and newlines are trimmed according to params communicated by the LSP client (with reasonable defaults provided as well). Labels (e.g.
main:
) are un-indented as needed, and anything else is given a single indent as needed.I initially tried using tree-sitter for this, but ran into too many errors with the existing asm grammar and ended up using regexes instead. In the future it may make sense to switch over to using tree-sitter for this feature once the existing grammar is better, or if we write our own.
Closes #42