fix languages.getDiagnostics() problem-matchers diagnostics duplication - #290278

fix languages.getDiagnostics() problem-matchers diagnostics duplication#290278

Dmitriy Vasyura (dmitrivMS) merged 1 commit into

microsoft:mainmicrosoft/vscode:mainfrom

n-gist:getDiagnostics-duplication-fixn-gist/vscode:getDiagnostics-duplication-fixCopy head branch name to clipboard