message: Fix list of suggestions for surrounding text
  The suggestion list is built from intellisense using snippets with ${\d}
  placeholders, mind the {}. We fix a regex, which was removing the {}.
diff: @@ -196,7 +196,7 @@ export class Command {
  const command = new CommandCompletionItem(`${backslash}${item.command}`, vscode.CompletionItemKind.Function)
  if (item.snippet) {
  if (useTabStops) {
  - item.snippet = item.snippet.replace(/\$\{(\d+):[^\}]*\}/g, '$$$1')
  + item.snippet = item.snippet.replace(/\$\{(\d+):[^\}]*\}/g, '$${$1}')
  }
  command.insertText = new vscode.SnippetString(item.snippet)
  } else {
  