Use deoplete only for vim8 (#1604)

* Use deoplete only for vim8

* Use deoplete only for vim8

* Fix gui fonts

* Fix 74

* Fix up

* Fix issue

autoload/SpaceVim.vim

@@ -104,7 +104,8 @@ let g:spacevim_realtime_leader_guide   = 1
 "   let g:spacevim_enable_key_frequency = 1
 " <
 let g:spacevim_enable_key_frequency = 0
-if has('python3') && SpaceVim#util#haspy3lib('neovim')
+if (has('python3') && SpaceVim#util#haspy3lib('neovim')) &&
+      \ (has('nvim') || (has('patch-8.0.0027')))
   ""
   " Set the autocomplete engine of spacevim, the default logic is:
   " >

autoload/SpaceVim/api/vim/compatible.vim

@@ -30,6 +30,7 @@ else
     else
       let s = a:1
     endif
+    let output = ''
     redir => output
     if s ==# 'silent'
       silent execute a:cmd

autoload/SpaceVim/issue.vim

@@ -13,12 +13,12 @@ function! SpaceVim#issue#report() abort
 endfunction
 
 function! s:open() abort
-  exe 'tabnew ' . tempname() . '/issue_report.md'
+  exe 'silent tabnew ' . tempname() . '/issue_report.md'
   let b:spacevim_issue_template = 1
   let template = s:template()
   call setline(1, template)
   let @+ = join(template, "\n")
-  w
+  silent w
 endfunction
 
 function! s:spacevim_status() abort
@@ -52,7 +52,7 @@ function! s:template() abort
         \ '',
         \ '## Output of the `:SPDebugInfo!`',
         \ '']
-        \ + split(SpaceVim#api#import('vim#compatible').execute(':SPDebugInfo'), "\n") +
+        \ + split(s:CMP.execute(':SPDebugInfo'), "\n") +
         \ [
         \ '## Screenshots',
         \ '',

autoload/SpaceVim/options.vim

@@ -5,16 +5,17 @@
 " URL: https://spacevim.org
 " License: GPLv3
 "=============================================================================
+let s:CPT = SpaceVim#api#import('vim#compatible')
 
 function! SpaceVim#options#list() abort
   let list = []
-  if has('patch-7.4.2010') && 0
+  if has('patch-7.4.2010')
     for var in getcompletion('g:spacevim_','var')
       call add(list, var . ' = ' . string(get(g:, var[2:] , '')))
     endfor
   else
     redraw
-    for var in filter(map(s:execute('let g:'), "matchstr(v:val, '\\S\\+')"), "v:val =~# '^spacevim_'")
+    for var in filter(map(split(s:CPT.execute('let g:'), "\n"), "matchstr(v:val, '\\S\\+')"), "v:val =~# '^spacevim_'")
       call add(list,'g:' . var . ' = ' . string(get(g:, var , '')))
     endfor
   endif
@@ -33,15 +34,4 @@ function! SpaceVim#options#set(argv, ...) abort
   endif
 endfunction
 
-function! s:execute(cmd) abort
-  if exists('*execute')
-    return split(execute(a:cmd), "\n")
-  endif
-
-  redir => output
-  execute a:cmd
-  redir END
-  return split(output, "\n")
-endfunction
-
 " vim:set et sw=2:

config/general.vim

@@ -29,5 +29,5 @@ if g:spacevim_hiddenfileinfo == 1 && has('patch-7.4.1570')
     set shortmess+=F
 endif
 if !empty(g:spacevim_guifont)
-    exe 'set guifont=' . g:spacevim_guifont
+    let &guifont = g:spacevim_guifont
 endif