split up write/redraw in test suite to improve reliability

Author: jbodah

spec/spec_helper.rb

@@ -76,7 +76,8 @@ def with_file(content = nil)
 
     yield if block_given?
 
-    @vim.normal ":w<CR>:redraw<CR>"
+    @vim.normal ":w<CR>"
+    @vim.normal ":redraw<CR>"
     IO.read(@file)
   end