While testing #21021.
tsc generates error messages of the following form:
[10:13:10] Error: /Users/me/Development/projects/vscode/extensions/html/server/src/modes/htmlMode.ts(36,31): Property 'findDocumentSymbols' does not exist on type 'LanguageService'.
[10:13:10] Error: /Users/me/Development/projects/vscode/extensions/markdown/src/extension.ts(50,36): Property 'com_mands' does not exist on type 'typeof 'vscode''.
The files are correctly linkified. We should have a link detection extension that also includes the line and column information so that we can directly jump to the error by clicking the link.