## What changes were proposed in this pull request?

Fix a few function description error.

## How was this patch tested?

manual tests

![descissues](https://cloud.githubusercontent.com/assets/5399861/26619392/d547736c-4610-11e7-85d7-aeeb09c02cc8.gif)

Author: Yuming Wang <wgyumg@gmail.com>

Closes #18157 from wangyum/DescIssues.