Fix slang warning message with square brackets (#427)

Author: RickLuiken

src/linter/SlangLinter.ts

@@ -93,7 +93,7 @@ export default class SlangLinter extends BaseLinter {
  { cwd: cwd },
  (_error: Error, _stdout: string, stderr: string) => {
  let diagnostics: vscode.Diagnostic[] = [];
- const re = /(.+?):(\d+):(\d+):\s(note|warning|error):\s([^[\]]*)(\[-W(.*)\])?/;
+ const re = /(.+?):(\d+):(\d+):\s(note|warning|error):\s(.*?)(\[-W(.*)\]|$)/;
  stderr.split(/\r?\n/g).forEach((line, _) => {
  if (line.search(re) === -1) {
  return;