Handle spliced strings in Regex Filter

[Former user]

Original [issue 57](https://code.google.com/p/okapi/issues/detail?id=57) created by @ysavourel on 2009-04-22T21:36:48.000Z:

The Regex Filter should be able to work with spliced strings like this:

Key="Part 1
part 2";

[Jim Hargrave (OLD)]

TestRules02.txt shows an example of this working in the unit tests.