fix: apply comment (getLanguageIdFromEditor returns grammar name)

Co-authored-by: Amin Yahyaabadi <[email protected]>

Author: ayame113

lib/auto-languageclient.ts

@@ -312,7 +312,9 @@ export default class AutoLanguageClient {
    * @param _editor A {TextEditor} which is opened.
    * @returns A {string} of `languageId` used for `textDocument/didOpen` notification.
    */
-  public getLanguageIdFromEditor(_editor: TextEditor): string | void | null {}
+  protected getLanguageIdFromEditor(_editor: TextEditor): string {
+    return this._editor.getGrammar().name
+  }
 
   // Helper methods that are useful for implementors
   // ---------------------------------------------------------------------------