[#1] show completion lsp source

templates/nvim/lua/lsp.lua.j2

@@ -111,11 +111,18 @@ local cmp = require('cmp')
 local luasnip = require('luasnip')
 
 cmp.setup({
-  snippet = {
-    expand = function(args)
-      luasnip.lsp_expand(args.body)
+  sources = {
+    { names = 'nvim_lsp', },
+    { names = 'luasnip', }, -- TODO: add snippets
+  },
+
+  formatting = {
+    format = function(entry, vim_item)
+      vim_item.menu = string.format('[%s]', entry.source.source.client.name)
+      return vim_item
     end,
   },
+
   mapping = cmp.mapping.preset.insert({
     ['<Tab>'] = cmp.mapping(function(fallback)
       if cmp.visible() then
@@ -136,8 +143,10 @@ cmp.setup({
       end
     end, { 'i', 's' }),
   }),
-  sources = {
-    { names = 'nvim_lsp', },
-    { names = 'luasnip', }, -- TODO: add snippets
+
+  snippet = {
+    expand = function(args)
+      luasnip.lsp_expand(args.body)
+    end,
   },
 })