Add mapping for auto detect the file encoding

autoload/SpaceVim/layers/tools.vim

@@ -1,6 +1,7 @@
 function! SpaceVim#layers#tools#plugins() abort
   return [
         \ ['tpope/vim-scriptease'],
+        \ ['mbbill/fencview',                 { 'on_cmd' : 'FencAutoDetect'}],
         \ ['SpaceVim/cscope.vim'],
         \ ['wsdjeg/vim-cheat',                { 'on_cmd' : 'Cheat'}],
         \ ['wsdjeg/SourceCounter.vim',        { 'on_cmd' : 'SourceCounter'}],
@@ -47,6 +48,8 @@ endfunction
 
 function! SpaceVim#layers#tools#config() abort
   call SpaceVim#mapping#space#def('nnoremap', ['a', 'c'], 'Calendar', 'vim calendar', 1)
+  call SpaceVim#mapping#space#def('nnoremap', ['e', 'a'], 'FencAutoDetect',
+        \ 'Auto detect the file encoding', 1)
   nmap mm <Plug>BookmarkToggle
   nmap mi <Plug>BookmarkAnnotate
   nmap ma <Plug>BookmarkShowAll

autoload/SpaceVim/mapping/space.vim

@@ -48,7 +48,7 @@ function! SpaceVim#mapping#space#init() abort
     call SpaceVim#mapping#menu('Open previous buffer', '[SPC]bp', 'bp')
     let g:_spacevim_mappings_space.b.N = ['bN', 'previous buffer']
     call SpaceVim#mapping#menu('Open previous buffer', '[SPC]bN', 'bp')
-    let g:_spacevim_mappings_space.e = {'name' : '+Errors'}
+    let g:_spacevim_mappings_space.e = {'name' : '+Errors/Encoding'}
     let g:_spacevim_mappings_space.B = {'name' : '+Global-uffers'}
     nnoremap <silent> [SPC]tn  :<C-u>setlocal nonumber! norelativenumber!<CR>
     let g:_spacevim_mappings_space.t.n = ['setlocal nonumber! norelativenumber!', 'toggle line number']

docs/documentation.md

@@ -449,10 +449,18 @@ All plugins can be easily discovered via `<leader> l p`.
 
 SpaceVim use utf-8 as default encoding. there are four options for these case:
 
-- fileencodings (fencs)
-- fileencoding (fenc)
-- encoding (enc)
-- termencoding (tenc)
+- fileencodings (fencs): ucs-bom,utf-8,default,latin1
+- fileencoding (fenc): utf-8
+- encoding (enc): utf-8
+- termencoding (tenc): utf-8 (only supported in vim)
+
+to fix messy display: `SPC e a` is the mapping for auto detect the file encoding. after detecting file encoding, you can run the command below to fix the encoding:
+
+```vim
+set enc=utf-8
+write
+```
+