diff --git a/seed/challenges/advanced-bonfires.json b/seed/challenges/advanced-bonfires.json
index 48bc294b7b0..3ee8a9f041a 100644
--- a/seed/challenges/advanced-bonfires.json
+++ b/seed/challenges/advanced-bonfires.json
@@ -179,28 +179,28 @@
         "",
         "// Example inventory lists",
         "var curInv = [",
-        "    [21, 'Bowling Ball'],",
-        "    [2, 'Dirty Sock'],",
-        "    [1, 'Hair Pin'],",
-        "    [5, 'Microphone']",
+        "    [21, \"Bowling Ball\"],",
+        "    [2, \"Dirty Sock\"],",
+        "    [1, \"Hair Pin\"],",
+        "    [5, \"Microphone\"]",
         "];",
         "",
         "var newInv = [",
-        "    [2, 'Hair Pin'],",
-        "    [3, 'Half-Eaten Apple'],",
-        "    [67, 'Bowling Ball'],",
-        "    [7, 'Toothpaste']",
+        "    [2, \"Hair Pin\"],",
+        "    [3, \"Half-Eaten Apple\"],",
+        "    [67, \"Bowling Ball\"],",
+        "    [7, \"Toothpaste\"]",
         "];",
         "",
         "inventory(curInv, newInv);"
       ],
       "tests": [
-        "assert.isArray(inventory([[21, 'Bowling Ball'], [2, 'Dirty Sock'], [1, 'Hair Pin'], [5, 'Microphone']], [[2, 'Hair Pin'], [3, 'Half-Eaten Apple'], [67, 'Bowling Ball'], [7, 'Toothpaste']]), 'message: <code>inventory()</code> should return an array.');",
-        "assert.equal(inventory([[21, 'Bowling Ball'], [2, 'Dirty Sock'], [1, 'Hair Pin'], [5, 'Microphone']], [[2, 'Hair Pin'], [3, 'Half-Eaten Apple'], [67, 'Bowling Ball'], [7, 'Toothpaste']]).length, 6, 'message: <code>inventory([[21, 'Bowling Ball'], [2, 'Dirty Sock'], [1, 'Hair Pin'], [5, 'Microphone']], [[2, 'Hair Pin'], [3, 'Half-Eaten Apple'], [67, 'Bowling Ball'], [7, 'Toothpaste']]).length</code> should return an array with a length of 6.');",
-        "assert.deepEqual(inventory([[21, 'Bowling Ball'], [2, 'Dirty Sock'], [1, 'Hair Pin'], [5, 'Microphone']], [[2, 'Hair Pin'], [3, 'Half-Eaten Apple'], [67, 'Bowling Ball'], [7, 'Toothpaste']]), [[88, 'Bowling Ball'], [2, 'Dirty Sock'], [3, 'Hair Pin'], [3, 'Half-Eaten Apple'], [5, 'Microphone'], [7, 'Toothpaste']], 'message: <code>inventory([[21, 'Bowling Ball'], [2, 'Dirty Sock'], [1, 'Hair Pin'], [5, 'Microphone']], [[2, 'Hair Pin'], [3, 'Half-Eaten Apple'], [67, 'Bowling Ball'], [7, 'Toothpaste']])</code> should return <code>[[88, 'Bowling Ball'], [2, 'Dirty Sock'], [3, 'Hair Pin'], [3, 'Half-Eaten Apple'], [5, 'Microphone'], [7, 'Toothpaste']]</code>.');",
-        "assert.deepEqual(inventory([[21, 'Bowling Ball'], [2, 'Dirty Sock'], [1, 'Hair Pin'], [5, 'Microphone']], []), [[21, 'Bowling Ball'], [2, 'Dirty Sock'], [1, 'Hair Pin'], [5, 'Microphone']], 'message: <code>inventory([[21, 'Bowling Ball'], [2, 'Dirty Sock'], [1, 'Hair Pin'], [5, 'Microphone']], [])</code> should return <code>[[21, 'Bowling Ball'], [2, 'Dirty Sock'], [1, 'Hair Pin'], [5, 'Microphone']]</code>.);",
-        "assert.deepEqual(inventory([], [[2, 'Hair Pin'], [3, 'Half-Eaten Apple'], [67, 'Bowling Ball'], [7, 'Toothpaste']]), [[67, 'Bowling Ball'], [2, 'Hair Pin'], [3, 'Half-Eaten Apple'], [7, 'Toothpaste']], 'message: <code>inventory([], [[2, 'Hair Pin'], [3, 'Half-Eaten Apple'], [67, 'Bowling Ball'], [7, 'Toothpaste']])</code> should return <code>[[67, 'Bowling Ball'], [2, 'Hair Pin'], [3, 'Half-Eaten Apple'], [7, 'Toothpaste']]</code>.');",
-        "assert.deepEqual(inventory([[0, 'Bowling Ball'], [0, 'Dirty Sock'], [0, 'Hair Pin'], [0, 'Microphone']], [[1, 'Hair Pin'], [1, 'Half-Eaten Apple'], [1, 'Bowling Ball'], [1, 'Toothpaste']]), [[1, 'Bowling Ball'], [0, 'Dirty Sock'], [1, 'Hair Pin'], [1, 'Half-Eaten Apple'], [0, 'Microphone'], [1, 'Toothpaste']], 'message: <code>inventory([[0, 'Bowling Ball'], [0, 'Dirty Sock'], [0, 'Hair Pin'], [0, 'Microphone']], [[1, 'Hair Pin'], [1, 'Half-Eaten Apple'], [1, 'Bowling Ball'], [1, 'Toothpaste']])</code> should return <code>[[1, 'Bowling Ball'], [0, 'Dirty Sock'], [1, 'Hair Pin'], [1, 'Half-Eaten Apple'], [0, 'Microphone'], [1, 'Toothpaste']]</code>.');"
+        "assert.isArray(inventory([[21, \"Bowling Ball\"], [2, \"Dirty Sock\"], [1, \"Hair Pin\"], [5, \"Microphone\"]], [[2, \"Hair Pin\"], [3, \"Half-Eaten Apple\"], [67, \"Bowling Ball\"], [7, \"Toothpaste\"]]), 'message: <code>inventory()</code> should return an array.');",
+        "assert.equal(inventory([[21, \"Bowling Ball\"], [2, \"Dirty Sock\"], [1, \"Hair Pin\"], [5, \"Microphone\"]], [[2, \"Hair Pin\"], [3, \"Half-Eaten Apple\"], [67, \"Bowling Ball\"], [7, \"Toothpaste\"]]).length, 6, 'message: <code>inventory([[21, \"Bowling Ball\"], [2, \"Dirty Sock\"], [1, \"Hair Pin\"], [5, \"Microphone\"]], [[2, \"Hair Pin\"], [3, \"Half-Eaten Apple\"], [67, \"Bowling Ball\"], [7, \"Toothpaste\"]]).length</code> should return an array with a length of 6.');",
+        "assert.deepEqual(inventory([[21, \"Bowling Ball\"], [2, \"Dirty Sock\"], [1, \"Hair Pin\"], [5, \"Microphone\"]], [[2, \"Hair Pin\"], [3, \"Half-Eaten Apple\"], [67, \"Bowling Ball\"], [7, \"Toothpaste\"]]), [[88, \"Bowling Ball\"], [2, \"Dirty Sock\"], [3, \"Hair Pin\"], [3, \"Half-Eaten Apple\"], [5, \"Microphone\"], [7, \"Toothpaste\"]], 'message: <code>inventory([[21, \"Bowling Ball\"], [2, \"Dirty Sock\"], [1, \"Hair Pin\"], [5, \"Microphone\"]], [[2, \"Hair Pin\"], [3, \"Half-Eaten Apple\"], [67, \"Bowling Ball\"], [7, \"Toothpaste\"]])</code> should return <code>[[88, \"Bowling Ball\"], [2, \"Dirty Sock\"], [3, \"Hair Pin\"], [3, \"Half-Eaten Apple\"], [5, \"Microphone\"], [7, \"Toothpaste\"]]</code>.');",
+        "assert.deepEqual(inventory([[21, \"Bowling Ball\"], [2, \"Dirty Sock\"], [1, \"Hair Pin\"], [5, \"Microphone\"]], []), [[21, \"Bowling Ball\"], [2, \"Dirty Sock\"], [1, \"Hair Pin\"], [5, \"Microphone\"]], 'message: <code>inventory([[21, \"Bowling Ball\"], [2, \"Dirty Sock\"], [1, \"Hair Pin\"], [5, \"Microphone\"]], [])</code> should return <code>[[21, \"Bowling Ball\"], [2, \"Dirty Sock\"], [1, \"Hair Pin\"], [5, \"Microphone\"]]</code>.');",
+        "assert.deepEqual(inventory([], [[2, \"Hair Pin\"], [3, \"Half-Eaten Apple\"], [67, \"Bowling Ball\"], [7, \"Toothpaste\"]]), [[67, \"Bowling Ball\"], [2, \"Hair Pin\"], [3, \"Half-Eaten Apple\"], [7, \"Toothpaste\"]], 'message: <code>inventory([], [[2, \"Hair Pin\"], [3, \"Half-Eaten Apple\"], [67, \"Bowling Ball\"], [7, \"Toothpaste\"]])</code> should return <code>[[67, \"Bowling Ball\"], [2, \"Hair Pin\"], [3, \"Half-Eaten Apple\"], [7, \"Toothpaste\"]]</code>.');",
+        "assert.deepEqual(inventory([[0, \"Bowling Ball\"], [0, \"Dirty Sock\"], [0, \"Hair Pin\"], [0, \"Microphone\"]], [[1, \"Hair Pin\"], [1, \"Half-Eaten Apple\"], [1, \"Bowling Ball\"], [1, \"Toothpaste\"]]), [[1, \"Bowling Ball\"], [0, \"Dirty Sock\"], [1, \"Hair Pin\"], [1, \"Half-Eaten Apple\"], [0, \"Microphone\"], [1, \"Toothpaste\"]], 'message: <code>inventory([[0, \"Bowling Ball\"], [0, \"Dirty Sock\"], [0, \"Hair Pin\"], [0, \"Microphone\"]], [[1, \"Hair Pin\"], [1, \"Half-Eaten Apple\"], [1, \"Bowling Ball\"], [1, \"Toothpaste\"]])</code> should return <code>[[1, \"Bowling Ball\"], [0, \"Dirty Sock\"], [1, \"Hair Pin\"], [1, \"Half-Eaten Apple\"], [0, \"Microphone\"], [1, \"Toothpaste\"]]</code>.');"
       ],
       "MDNlinks": [
         "Global Array Object"
diff --git a/seed/challenges/intermediate-bonfires.json b/seed/challenges/intermediate-bonfires.json
index 35ccf0c7f9e..684afd44e83 100644
--- a/seed/challenges/intermediate-bonfires.json
+++ b/seed/challenges/intermediate-bonfires.json
@@ -151,9 +151,8 @@
       ],
       "tests": [
         "assert.deepEqual(where([{ first: \"Romeo\", last: \"Montague\" }, { first: \"Mercutio\", last: null }, { first: \"Tybalt\", last: \"Capulet\" }], { last: \"Capulet\" }), [{ first: \"Tybalt\", last: \"Capulet\" }], 'message: <code>where()</code> should return an array of objects.');",
-        "assert.deepEqual(where([{ 'a\": 1 }, { \"a\": 1 }, { \"a\": 1, \"b\": 2 }], { \"a\": 1 }), [{ \"a\": 1 }, { \"a\": 1 }, { \"a\": 1, \"b\": 2 }], 'message: <code>where([{ \"a\": 1 }, { \"a\": 1 }, { \"a\": 1, \"b\": 2 }], { \"a\": 1 })</code> should return <code>[{ \"a\": 1 }, { \"a\": 1 }, { \"a\": 1, \"b\": 2 }]</code>.');",
-        "assert.deepEqual(where([{ \"a\": 1, \"b\": 2 }, { \"a\": 1 }, { \"a\": 1, \"b\": 2, \"c\": 2 }], { \"a\": 1, \"b\": 2 }), [{ \"a\": 1, \"b\": 2 }, { \"a\": 1, \"b\": 2, \"c\": 2 }], 'message: <code>where([{ \"a\": 1, \"b\": 2 }, { \"a\": 1 }, { \"a\": 1, \"b\": 2, \"c\": 2 }], { \"a\": 1, \"b\": 2 })</code> should return <code>[{ \"a\": 1, \"b\": 2 }, { \"a\": 1, \"b\": 2, \"c\": 2 }]</code>.');",
-        "assert.deepEqual(where([{ \"a\": 5 }, { \"b\": 10 }, { \"a\": 5, \"b\": 10 }], { \"a\": 5, \"b\": 10 }), [{ \"a\": 5, \"b\": 10 }], 'message: <code>where([{ \"a\": 5 }, { \"b\": 10 }, { \"a\": 5, \"b\": 10 }], { \"a\": 5, \"b\": 10 })</code> should return <code>[{ \"a\": 5, \"b\": 10 }]</code>.');"
+        "assert.deepEqual(where([{ \"a\": 1 }, { \"a\": 1 }, { \"a\": 1, \"b\": 2 }], { \"a\": 1 }), [{ \"a\": 1 }, { \"a\": 1 }, { \"a\": 1, \"b\": 2 }], 'message: <code>where([{ \"a\": 1 }, { \"a\": 1 }, { \"a\": 1, \"b\": 2 }], { \"a\": 1 })</code> should return <code>[{ \"a\": 1 }, { \"a\": 1 }, { \"a\": 1, \"b\": 2 }]</code>.');",
+        "assert.deepEqual(where([{ \"a\": 1, \"b\": 2 }, { \"a\": 1 }, { \"a\": 1, \"b\": 2, \"c\": 2 }], { \"a\": 1, \"b\": 2 }), [{ \"a\": 1, \"b\": 2 }, { \"a\": 1, \"b\": 2, \"c\": 2 }], 'message: <code>where([{ \"a\": 1, \"b\": 2 }, { \"a\": 1 }, { \"a\": 1, \"b\": 2, \"c\": 2 }], { \"a\": 1, \"b\": 2 })</code> should return <code>[{ \"a\": 1, \"b\": 2 }, { \"a\": 1, \"b\": 2, \"c\": 2 }]</code>.');"
       ],
       "MDNlinks": [
         "Global Object",
@@ -442,13 +441,13 @@
         "convert(\"Dolce & Gabbana\");"
       ],
       "tests": [
-        "assert.match(convert(\"Dolce & Gabbana\"), /Dolce &amp; Gabbana/, 'message: <code>convert(\"Dolce & Gabbana\")</code> should return <code>Dolce &amp; Gabbana</code>.');",
-        "assert.match(convert(\"Hamburgers < Pizza < Tacos\"), /Hamburgers &lt; Pizza &lt; Tacos/, 'message: <code>convert(\"Hamburgers < Pizza < Tacos\")</code> should return <code>Hamburgers &lt; Pizza &lt; Tacos</code>.');",
-        "assert.match(convert(\"Sixty > twelve\"), /Sixty &gt; twelve/, 'message: <code>convert(\"Sixty > twelve\")</code> should return <code>Sixty &gt; twelve</code>.');",
-        "assert.match(convert('Stuff in \"quotation marks\"'), /Stuff in &quot;quotation marks&quot;/, 'message: <code>convert('Stuff in \"quotation marks\"')</code> should return <code>Stuff in &quot;quotation marks&quot;</code>.');",
-        "assert.match(convert(\"Shindler's List\"), /Shindler&apos;s List/, 'message: <code>convert(\"Shindler's List\")</code> should return <code>Shindler&apos;s List</code>.');",
-        "assert.match(convert('<>'), /&lt;&gt;/, 'message: <code>convert('<>')</code> should return <code>&lt;&gt;</code>.');",
-        "assert.strictEqual(convert('abc'), 'abc', 'message: <code>convert(\"abc\")</code> should return <code>\"abc\"</code>.');"
+        "assert.match(convert(\"Dolce & Gabbana\"), /Dolce &amp; Gabbana/, 'message: <code>convert(\"Dolce & Gabbana\")</code> should return <code>Dolce &&#8203;amp; Gabbana</code>.');",
+        "assert.match(convert(\"Hamburgers < Pizza < Tacos\"), /Hamburgers &lt; Pizza &lt; Tacos/, 'message: <code>convert(\"Hamburgers < Pizza < Tacos\")</code> should return <code>Hamburgers &&#8203;lt; Pizza &&#8203;lt; Tacos</code>.');",
+        "assert.match(convert(\"Sixty > twelve\"), /Sixty &gt; twelve/, 'message: <code>convert(\"Sixty > twelve\")</code> should return <code>Sixty &&#8203;gt; twelve</code>.');",
+        "assert.match(convert('Stuff in \"quotation marks\"'), /Stuff in &quot;quotation marks&quot;/, 'message: <code>convert(&apos;Stuff in \"quotation marks\"&apos;)</code> should return <code>Stuff in &&#8203;quot;quotation marks&&#8203;quot;</code>.');",
+        "assert.match(convert(\"Shindler's List\"), /Shindler&apos;s List/, 'message: <code>convert(\"Shindler&apos;s List\")</code> should return <code>Shindler&&#8203;apos;s List</code>.');",
+        "assert.match(convert('<>'), /&lt;&gt;/, 'message: <code>convert(\"<>\")</code> should return <code>&&#8203;lt;&&#8203;gt;</code>.');",
+        "assert.strictEqual(convert('abc'), 'abc', 'message: <code>convert(\"abc\")</code> should return <code>abc</code>.');"
       ],
       "MDNlinks": [
         "RegExp",