Fix ad support in zsh

autoload/SpaceVim.vim

@@ -47,7 +47,14 @@ function! SpaceVim#init() abort
     let g:spacevim_checkinstall            = 0
     let g:spacevim_hiddenfileinfo          = 1
     let g:spacevim_plugin_groups_exclude   = []
-    let g:spacevim_plugin_groups = []
+    ""
+    " groups of plugins should be loaded. 
+    "
+    " example: >
+    "    let g:spacevim_plugin_groups = ['core', 'lang']
+    " <
+    " now Space Vim support these groups:
+    let g:spacevim_plugin_groups           = []
     let g:spacevim_smartcloseignorewin     = ['__Tagbar__' , 'vimfiler:default']
     let g:spacevim_smartcloseignoreft      = ['help']
     let g:spacevim_altmoveignoreft         = ['Tagbar' , 'vimfiler']

autoload/zvim/util.vim

@@ -254,7 +254,7 @@ fu! zvim#util#Generate_ignore(ignore,tool) abort
     if a:tool ==# 'ag'
         for ig in split(a:ignore,',')
             call add(ignore, '--ignore')
-            call add(ignore, ig)
+            call add(ignore, '"' . ig . '"')
         endfor
     elseif a:tool ==# 'rg'
         for ig in split(a:ignore,',')

doc/SpaceVim.txt

@@ -37,6 +37,15 @@ The default file manager of SpaceVim.
 The default plugin manager of SpaceVim, dein, neobundle or vim-plug. by
 default it is dein.
 
+                                                    *g:spacevim_plugin_groups*
+groups of plugins should be loaded.
+
+example:
+>
+   let g:spacevim_plugin_groups = ['core', 'lang']
+<
+now Space Vim support these groups:
+
                                                         *g:spacevim_hosts_url*
 The host file url. this option is for chinese users who can not use google and
 twitter.