:VimwikiGoto tab completion only works when written in-line, not when called from \wn

[igor-kupczynski]

PR #785 adds completion to :VimwikiGoto, however it works only when you try to type the filename after the command, e.g.

Say I have a file called Hammerspoon.md

:VimwikiGoto Hamm<tab>    # ✅  shows the completion pop-up

It doesn't work when called like that:

:VimwikiGoto<ret>
Hamm<tab>                  # ❌ shows `Hamm^I` (see below)

This is more problematic when used together with the <Leader>wn keyboard shortcut because it acts like the second, broken way.

It would be nice to improve the completion.

Env

$ nvim --version
NVIM v0.4.3

:VimwikiShowVersion
Stable version: 2.5

call minpac#add('vimwiki/vimwiki')
let g:vimwiki_list = [
    \ {'path': '~/Notes', 'syntax': 'markdown', 'ext': '.md', 'index': 'README'},
.. other wikis here
    \ }
    \ ]

[tinmarino]

Fixed: 75a9232
<- input() is taking the completion desired as argument
-> wanna see my dirty face ->

function! vimwiki#base#goto(...) abort
  let key = a:0 > 0 ? a:1 : input('Enter name: ', '',
        \ 'customlist,vimwiki#base#complete_links_escaped')

Thanks for the feedback