Improvements to full-nowiki wrapping in a quote context

* When there are non-quote escapable characters in a string,
  verify that they actually need escaping before doing a full
  nowiki wrap.

* Fixes nowiki wrapping issues like this:
  http://parsoid-tests.wikimedia.org/resultFlagNew/0554e63c5c90ff3d799f7a3990b534fd9e79787d/56cd9926b3ddd38c7670810671ff957bc4e35298/frwiki/T%C3%A9m%C3%A9raire_%28fantasy%29

* Updated existing parser test to capture this expectation.

Change-Id: Ib4d3f0c88b1836d4247546d013cf9276b2676fb9
Merge "Improvements to full-nowiki wrapping in a quote context"