#697 - Clear all highlights every time items are set again, and refactor most things. Clear errors when linters are removed

test/test_lint_on_enter_when_file_changed.vader

@@ -30,6 +30,8 @@ After:
   call setloclist(0, [])
 
 Execute(The file changed event function should set b:ale_file_changed):
+  let g:ale_lint_on_enter = 0
+
   if has('gui')
     new
   else