x/tools/gopls: extra autocompletion after complete keyword

[stamblerre]

In this example, the full keyword true was typed, but it was still the 3rd ranked completion, which results in VS Code auto-inserting it if a user hits enter (intending to go to the next line).

/cc @muirdm

[muirdm]

Yeah I've been meaning to fix this. It is because true is an untyped bool which gets a score penalty. I'll fix it to not penalize builtin constants.

[gopherbot]

Change https://golang.org/cl/213137 mentions this issue: internal/lsp/source: don't dowrank builtin constant completions