transact = (editor, fn) => {
          const checkpoint = editor.createCheckpoint();
          fn();
          editor.groupChangesSinceCheckpoint(checkpoint);
        }
');
              expect(editor.lineTextForBufferRow(6)).toBe('\t\t\t * testing');
              expect(editor.lineTextForBufferRow(7)).toBe('\t\t\t * indent');
              expect(editor.lineTextForBufferRow(8)).toBe('\t\t\t *