refactor: avoid _G qualifier when not needed

Author: wincent

lua/wincent/commandt/private/mocks/vim/inspect.lua

@@ -8,7 +8,7 @@ function M.setup()
     _G.vim = {}
   end
 
-  _G.vim.inspect = function(value)
+  vim.inspect = function(value)
     return '<inspect:' .. type(value) .. '>'
   end
 end

lua/wincent/commandt/private/mocks/vim/iter.lua

@@ -45,7 +45,7 @@ function M.setup()
     return self._list
   end
 
-  _G.vim.iter = function(list)
+  vim.iter = function(list)
     return Iter.new(list)
   end
 end