Raimondi/delimitMate — pull request #148 by blueyed (2013-11-27 22:35:16+00:00)
Title: maps: return <C-p> if pumvisible() with S-Tab map

When a popup menu is visible, map to (previous), instead
of to delimitMateS-Tab.

I have tried returning itself, but that got not picked up by YouCompleteMe (which maps it to previous also, if the popup menu is visible).