On Sunday, November 9, 2014 11:53:38 AM UTC-6, Eric Christopherson wrote:
> On Thu, Nov 06, 2014, Ben Fritz wrote:
> > 
> > if exists('+relativenumber')
> >   nnoremap <expr> <C-Space> CycleLNum()
> >   xnoremap <expr> <C-Space> CycleLNum()
> >   onoremap <expr> <C-Space> CycleLNum()
> > 
> >   " function to cycle between normal, relative, and no line numbering
> >   func! CycleLNum()
> >     if &l:rnu && !&l:nu
> >       setlocal nu
> >     elseif &l:rnu && &l:nu
> >       setlocal nornu
> >     elseif &l:nu && !&l:rnu
> >       setlocal nonu
> >     else
> >       setlocal rnu
> >     endif
> >     " sometimes (like in op-pending mode) the redraw doesn't happen
> >     " automatically
> >     redraw
> >     " do nothing, even in op-pending mode
> >     return ""
> >   endfunc
> > endif
> > 
> > Thus when I hit <C-Space> in any of these modes, nothing happens, which 
> > allows me to continue with my operation, but the line numbering changes as 
> > a side effect.
> 
> - the visual representation of the cursor moves to the end of the
>   screen, although the actual logical cursor position in Vim isn't
>   changed. Surprisingly, this affects GUI vim too.
> 
> I'm using MacVim 7.4 (73), which has Vim 7.4.258 in it.
> 

I've noticed this myself over the last few years I've been using the mapping. 
Especially this is apparent in operator-pending mode. It looks like some sort 
of bug in Vim. I thought I reported it before but I can't find it now.

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