Fixup custom-kind (#529)

Author: Christian Clason

autoload/lsp/omni.vim

@@ -117,8 +117,7 @@ function! lsp#omni#get_kind_text(completion_item, ...) abort
         if !has_key(s:completion_item_kinds, l:server)
             let l:server_info = lsp#get_server_info(l:server)
             if has_key (l:server_info, 'config') && has_key(l:server_info['config'], 'completion_item_kinds')
-                let s:completion_item_kinds[l:server] = s:default_completion_item_kinds
-                call extend(s:completion_item_kinds[l:server] , l:server_info['config']['completion_item_kinds'])
+                let s:completion_item_kinds[l:server] = extend(copy(s:default_completion_item_kinds), l:server_info['config']['completion_item_kinds'])
             else
                 let s:completion_item_kinds[l:server] = s:default_completion_item_kinds
             endif

autoload/lsp/ui/vim/utils.vim

@@ -182,8 +182,7 @@ function! s:get_symbol_text_from_kind(server, kind) abort
     if !has_key(s:symbol_kinds, a:server)
         let l:server_info = lsp#get_server_info(a:server)
         if has_key (l:server_info, 'config') && has_key(l:server_info['config'], 'symbol_kinds')
-            let s:symbol_kinds[a:server] = s:default_symbol_kinds
-            call extend(s:symbol_kinds[a:server], l:server_info['config']['symbol_kinds'])
+            let s:symbol_kinds[a:server] = extend(copy(s:default_symbol_kinds), l:server_info['config']['symbol_kinds'])
         else
             let s:symbol_kinds[a:server] = s:default_symbol_kinds
         endif