Slice source text instead of copying it line by line for outlining - #20443

Slice source text instead of copying it line by line for outlining#20443

xperiandri wants to merge 12 commits into

dotnet:maindotnet/fsharp:mainfrom

xperiandri:outlining-line-slicesxperiandri/fsharp:outlining-line-slicesCopy head branch name to clipboard