* Add further tests with quotes.
* Handle prefix in strings.
* Remove old originalTokenContent which is no longer in use, as we use
str_replace, introduced in earlier commit.
Relates: #72
* As sometimes not the whole token should be replaces, but only the
classname within the token, we replace them always this way.
* Before the refactoring, that was done in the concrete sniffs.
* Affected are e.g. php doc comments.
Relates: #72