Fix what looks like an off-by-one error in RegEx::longestMatch()'s lastMatch calculation, and a corresponding +1 in code using longestMatch, and add a test.

include/RegEx.h

@@ -21,9 +21,10 @@ class RegEx {
 		int longMatch(std::string stringToMatch);
 		std::string getPattern();
 		std::string toString();
+		static void test();
 	private:
 		std::string pattern;
 		RegExState* begin;
 		std::vector<RegExState*> currentStates;
 };
-#endif
+#endif