custom file type completion rewritten as completion contributor
brace matcher-based select word in custom file types (IDEA-117225)
in custom file types, don't complete keywords in literals or comments (IDEA-117226)
highlight usages in custom file type works as text highlighting (IDEA-117189)
structural brace based folding for custom file types (IDEA-83026)
gdsl: be prepared to multithreaded scripts
CustomFileTypeWordSelectionTest.isCommunity==true