Clean up a bunch of spec global variable leaks

Also some formatting changes to highlight when using one 'var' with comma operator

spec/core/matchers/toBeGreaterThanSpec.js

@@ -8,7 +8,8 @@ describe("toBeGreaterThan", function() {
   });
 
   it("fails when actual <= expected", function() {
-    var matcher = j$.matchers.toBeGreaterThan();
+    var matcher = j$.matchers.toBeGreaterThan(),
+      result;
 
     result = matcher.compare(1, 1);
     expect(result.pass).toBe(false);