Evas textblock: Only parse formats that can change the format stack.
Evas textblock: Only parse formats that can change the format stack.

No need to parse all the newlines when all we want is just to modify the
format stack.

git-svn-id: 24a995eca3b83137dd7eab3408044d7832e202f7@59319 7cbeb6ba-43b4-40fd-8cce-4c39aea84d33

antognolli/Evas,antognolli/Evas,antognolli/Evas,antognolli/Evas