Use j$.pp instead of JSON.stringify() for pretty printing

spec/core/ExceptionFormatterSpec.js

@@ -124,18 +124,7 @@ describe("ExceptionFormatter", function() {
 
       var result = new jasmineUnderTest.ExceptionFormatter().stack(error);
 
-      expect(result).toMatch(/error properties: {/);
-      expect(result).toMatch(/"someProperty": "hello there"/);
-    });
-
-    it("drops error properties if there is a cycle", function() {
-      var error;
-      try { throw new Error("an error") } catch(e) { error = e; }
-      error.someProperty = error;
-
-      var result = new jasmineUnderTest.ExceptionFormatter().stack(error);
-
-      expect(result).not.toMatch(/error properties/);
+      expect(result).toMatch(/error properties:.*someProperty.*hello there/);
     });
 
   });

src/core/ExceptionFormatter.js

@@ -74,9 +74,7 @@ getJasmineRequireObj().ExceptionFormatter = function(j$) {
       }
 
       if (!empty) {
-        try {
-          return 'error properties: ' + JSON.stringify(result, null, 2) + '\n';
-        } catch (_) {}
+        return 'error properties: ' + j$.pp(result) + '\n';
       }
 
       return '';