vim-patch:8.1.0711: test files still use function!

Problem:    Test files still use function!.
Solution:   Remove the exclamation mark.  Fix overwriting a function.
1e1153600c

Some of the changes were already applied previously.

test/functional/legacy/eval_spec.lua

@@ -666,7 +666,7 @@ describe('eval', function()
     source([[
       " Vim script used in test_eval.in.  Needed for script-local function.
 
-      func! s:Testje()
+      func s:Testje()
         return "foo"
       endfunc