fix ctrlp buffer name

[HerringtonDarkholme]

Requirements (please check off with 'x')

• I have read the Contributing Guidelines
• I have read or at least glanced at the FAQ
• I have read or at least glanced at the Wiki

What does this Pull Request (PR) do?

Fix CtrlPBuffer name is [no named]

How should this be manually tested?

Install ctrlp + vimdevicon. Open multiple files. Open CtrlPBuffer

Any background context you can provide?

What are the relevant tickets (if any)?

#183

Screenshots (if appropriate or helpful)

[darrinholst]

This gets the buffer names back. Is it possible to get the icons to go with them?

[HerringtonDarkholme]

I think it requires another commit to address icon. buffer is handled specially in ctrlp.

[ryanoasis]

@HerringtonDarkholme Hey great fix! Thanks for this 👍 This is simple and clever way to handle it (wish I had realized this 😊)

@darrinholst @HerringtonDarkholme Yeah actually to have the icons would require another pull request to ctrlp 😞 . This is because of how the formatline function only accepts 1 param. I think it would have to accept 2 params (one for the entire line and a separate one for just the path)

Here is where things fall apart passing the icon and path as a single param (from ctrlp):

" Line formatting {{{3
fu! s:formatline(str)
    let str = a:str
    let ct = s:curtype()
    if ct == 'buf'
        let bufnr = s:bufnrfilpath(str)[0]
        " ^ we have a problem here now!
        " ...

[HerringtonDarkholme]

Thanks!