Merge branch 'manu09-patch-1'

Close #4938

plugins/wp-cli/README.md

@@ -6,6 +6,8 @@ WordPress Command Line Interface (http://wp-cli.org/)
 
 WP-CLI is a set of command-line tools for managing WordPress installations. You can update plugins, set up multisite installs and much more, without using a web browser.
 
+This plugin adds [tab completion](http://wp-cli.org/#complete) for `wp-cli` as well as several aliases.
+
 ## List of Aliases
 
 ### Core