Allowing empty word complete item (#378)

* Modify to allowing empty word complete item.
* Fix test.

Author: mikoto2000

autoload/lsp/omni.vim

@@ -193,6 +193,7 @@ function! lsp#omni#get_vim_completion_item(item, ...) abort
                 \ 'info': '',
                 \ 'icase': 1,
                 \ 'dup': 1,
+                \ 'empty': 1,
                 \ 'kind': l:kind}
 
     " check support user_data.
@@ -254,7 +255,7 @@ function! s:apply_text_edit() abort
     endif
 
     " completion faild or not select complete item
-    if empty(v:completed_item) || v:completed_item['word'] ==# ''
+    if empty(v:completed_item)
         return
     endif
 

test/lsp/omni.vimspec

@@ -14,6 +14,7 @@ Describe lsp#omni
             \ 'info': 'my documentation.',
             \ 'icase': 1,
             \ 'dup': 1,
+            \ 'empty': 1,
             \ 'kind': 'function',
             \ 'menu': 'my-detail'
             \}
@@ -55,6 +56,7 @@ Describe lsp#omni
             \ 'info': 'my documentation.',
             \ 'icase': 1,
             \ 'dup': 1,
+            \ 'empty': 1,
             \ 'kind': 'function',
             \ 'menu': 'my-detail',
             \ 'user_data': l:want_user_data_string
@@ -83,6 +85,7 @@ Describe lsp#omni
             \ 'info': 'my documentation.',
             \ 'icase': 1,
             \ 'dup': 1,
+            \ 'empty': 1,
             \ 'kind': 'function',
             \ 'menu': 'my-detail',
             \}