Start to clean up settings.html.

Check that settings.html has at least balanced tags, and
automate the checking of those tags.

(imported from commit 35e9be269caa211803d64f2b54cb0287e13707b3)

templates/zerver/settings.html

@@ -4,8 +4,10 @@
 
   <div class="alert" id="settings-status"></div>
   <div id="settings-change-box">
+
     <form action="/json/settings/change" method="post"
           class="form-horizontal">{% csrf_token %}
+
     <div id="account-settings" class="settings-section">
       <div class="settings-section-title"><i class="icon-vector-user settings-section-icon"></i>Your Account</div>
         <div class="account-settings-form">
@@ -144,12 +146,17 @@
           </div>
         </div>
     </div>
+
     </div>
+
     </form>
+
   </div>
 
     <div id="bot-settings" class="settings-section">
+
       <div class="settings-section-title"><i class="icon-vector-github settings-section-icon"></i>Your Bots</div>
+
     <div class="bot-settings-form">
     <p class="bot-settings-note">Looking for our <a href="/integrations" target="_blank">Integrations</a>
     or <a href="/api" target="_blank">API</a> documentation?</p>
@@ -181,7 +188,8 @@
         <button class="btn" id="bot_avatar_upload_button">Customize avatar</button> (Optional)
        </div>
       </div>
-      </p>
+    </div>
+
       <p>
         <div id="bot_avatar_file_input_error" class="text-error"></div>
       </p>
@@ -192,7 +200,7 @@
       </div>
       <div id="create_bot_spinner"></div>
     </div>
-    </div>
+
     </form>
     <hr class="settings_separator" />
 
@@ -200,7 +208,8 @@
         <p class="api-key-note">For most bots using the API, you'll want to give each bot
         its own name and API key using the above section.  But if you
         want to write a bot that can access your own private
-        messages, you should use your personal API key.</p>
+        messages, you should use your personal API key.
+        </p>
         <div class="control-group">
           <button class="btn" id="api_key_button">Show/change your API key</button>
         </div>
@@ -234,6 +243,7 @@
     </div>
 
 
+
   <div id="word-alert-settings" class="settings-section">
     <div class="settings-section-title"><i class="icon-vector-book settings-section-icon"></i>Custom Word Alerts</div>
     <ul id="word-alerts">

tools/check-handlebar-templates

@@ -84,7 +84,15 @@ def validate(fn):
     assert state.depth == 0
 
 git_files = map(str.strip, check_output(['git', 'ls-files']).split('\n'))
+
+# Check all our handlebars templates.
 templates = [fn for fn in git_files if fn.endswith('.handlebars')]
 assert len(templates) >= 10 # sanity check that we are actually doing work
+
+# Django templates are pretty messy now, so we whitelist them for now.
+templates += [
+    'templates/zerver/settings.html'
+]
+
 for fn in templates:
     validate(fn)