_layouts: Add linebreaks to announcement.html, module.html

_layouts/announcement.html

 <div class="announcement">
-  <h2 class="announcement-header">{% if page.date %}<strong class="announcement-meta">{{ page.date | date: '%b %e' }}</strong> {% endif %}{{ page.title }}</h2>
+  <h2 class="announcement-header">
+    {% if page.date %}
+    <strong class="announcement-meta">{{ page.date | date: '%b %e' }}</strong>
+    {% endif %}
+    {{ page.title }}
+  </h2>
   <div class="announcement-body">
     {{ content }}
   </div>

_layouts/module.html

 <div class="module">
-  <h2 class="module-header">{% if page.week %}<strong class="module-meta">Week {{ page.week }}</strong> {% endif %}{{ page.title }}</h2>
+  <h2 class="module-header">
+    {% if page.week %}
+    <strong class="module-meta">Week {{ page.week }}</strong>
+    {% endif %}
+    {{ page.title }}
+  </h2>
   {% if page.days %}
   <dl class="module-days">
     {% for day in page.days %}