Fix issues discovered by @eaglecookie and @sonorangirl

seed/challenges/jquery.json

@@ -257,7 +257,7 @@
       "title": "Target the same element with multiple jQuery Selectors",
       "difficulty": 3.06,
       "description": [
-        "Now you know three ways of targeting elements: by type <code>$(\"button\")</code>, by class <code>$(\".btn\")</code>), and by id <code>$(\"#target1\")</code>).",
+        "Now you know three ways of targeting elements: by type: <code>$(\"button\")</code>, by class: <code>$(\".btn\")</code>, and by id <code>$(\"#target1\")</code>.",
         "Use each of these jQuery selectors to target your <code>button</code> element with the class \"btn\" and the id \"target1\".",
         "Use the <code>addClass()</code> jQuery function to give the element one new class for each selector: \"animated\", \"shake\", and \"btn-primary\"."
       ],