refactor(vim): make the completion menu wider

Due to starting to learn clojure, I've had java classes popping up in
the completion menu. Because they are so long it needs to be wider so I
can see then.

site-modules/core/files/vim/plugin/completion.lua

@@ -73,7 +73,7 @@ cmp.setup({
       fields = {   'menu', 'abbr', 'kind' },
       format = function(entry, vim_item)
         -- Give the completion menu a consistent size to stop it jumping arround
-        local width = 34
+        local width = 40
         if #vim_item.abbr > width then
           vim_item.abbr = string.sub(vim_item.abbr, 1, width)
         else