Valloric/YouCompleteMe — pull request #601 by zhaocai (2013-10-20 22:57:53+00:00)
Title: Add Cmdline completion

It works in the cmdline mode. For example, you are typing to replace `ycm` with `youcompleteme` with command `%s/ycm!youco^!gc`. The cursor is `^`, now you can hit `` to get auto completion. Hit `` or `` to choose next or previous candidates.