message: chore: fix comment typo
diff: @@ -193,7 +193,7 @@ export function mountComponent (
  }
  }
  - // we set this to vm._watcher inside the wathcer's constructor
  + // we set this to vm._watcher inside the watcher's constructor
  // since the watcher's initial patch may call $forceUpdate (e.g. inside child
  // component's mounted hook), which relies on vm._watcher being already defined
  new Watcher(vm, updateComponent, noop, null, true /* isRenderWatcher */)
  