Add test for syntax highlighting moonscript code block

spec/renderers_spec.moon

@@ -32,32 +32,40 @@ print("hello world")
 
       assert.same [[<div class="highlight"><pre><span></span><code><span class="py-nb">print</span><span class="py-p">(</span><span class="py-s2">&quot;hello world&quot;</span><span class="py-p">)</span></code></pre></div>]], out
 
+    it "syntax highlights moonscript code", ->
+      out = flatten_html render [[
+```moonscript
+print "Hi, #{@name}!"
+```]]
+
+      assert.same [[<div class="highlight"><pre><span></span><code><span class="py-nb">print</span><span class="py-s2">&quot;</span><span class="py-s">Hi, </span><span class="py-si">#{</span><span class="py-vc">@name</span><span class="py-si">}</span><span class="py-s">!</span><span class="py-s2">&quot;</span></code></pre></div>]], out
+
     it "doesnt highlight code inside of a cosmo template", ->
       site.user_vars.hello = (_, args) ->
         { template } = args
         template
 
       out = flatten_html render [=[
-  ```lua
-  print 5
-  ```
-  $hello{[[
+```lua
+print 5
+```
+$hello{[[
   ```lua
   print thing
   ```
-  ]]}]=]
+]]}]=]
 
       assert.same [=[<div class="highlight"><pre><span></span><code><span class="py-nb">print</span><span class="py-mi">5</span></code></pre></div><p>
   ```lua
   print thing
   ```
-  </p>]=], out
+</p>]=], out
 
     it "doesn't highlight unrecognized code languages", ->
       out = flatten_html render [[
-  ```snickerdoodle
-  this code block has an unknown label
-  ```]]
+```snickerdoodle
+this code block has an unknown label
+```]]
 
       assert.same [[<div class="sourceCode"><pre class="sourceCode"><code>this code block has an unknown label</code></pre></div>]], out