Improve errors with the domaine and how to use the API

src/core/matchers/toMatch.js

@@ -1,10 +1,12 @@
 getJasmineRequireObj().toMatch = function(j$) {
 
+  var getErrorMsg = j$.formatErrorMsg('<toMatch>', 'expect(<expectation>).toMatch(<string> || <regexp>)');
+
   function toMatch() {
     return {
       compare: function(actual, expected) {
         if (!j$.isString_(expected) && !j$.isA_('RegExp', expected)) {
-          throw new Error('Expected is not a String or a RegExp');
+          throw new Error(getErrorMsg('Expected is not a String or a RegExp'));
         }
 
         var regexp = new RegExp(expected);