Show details (type info, etc.) in completion menu (#229)

Author: keremc

autoload/lsp/omni.vim

@@ -164,9 +164,14 @@ function! lsp#omni#get_vim_completion_item(item) abort
     let l:menu = lsp#omni#get_kind_text(a:item)
     let l:completion = { 'word': l:word, 'abbr': l:abbr, 'menu': l:menu, 'info': '', 'icase': 1, 'dup': 1 }
 
-    if has_key(a:item, 'detail') 
-      let l:completion['info'] .= a:item['detail'] . ' '
-    endif 
+    if has_key(a:item, 'detail') && !empty(a:item['detail'])
+        if empty(l:menu)
+            let l:completion['menu'] = a:item['detail']
+        else
+            let l:completion['menu'] = '[' . l:menu . '] ' . a:item['detail']
+        endif
+        let l:completion['info'] .= a:item['detail'] . ' '
+    endif
 
     if has_key(a:item, 'documentation')
         if type(a:item['documentation']) == type('')