[OB] whitespace cleanup, completer.c

[Eli Zaretskii]

> Date: Fri, 10 Aug 2007 13:45:18 -0700 (PDT)
> From: msnyder@sonic.net
> 
> Spaces, caps, that sort of thing...

Thanks.

> ! 	      /* Insure that readline does the right thing
                 ^^^^^^
Actually, this should be "Ensure".