Tidy.

index.html

@@ -2542,12 +2542,12 @@ <h2>
         Display modes
       </h2>
       <p>
-        A <dfn  class="export">display mode</dfn> represents how the web application is being
-        presented within the context of an OS (e.g., in fullscreen, etc.).
-        Display modes correspond to user interface (UI) metaphors and
-        functionality in use on a given platform. The UI conventions of the
-        display modes are purely advisory and implementers are free to
-        interpret them how they best see fit.
+        A <dfn class="export">display mode</dfn> represents how the web
+        application is being presented within the context of an OS (e.g., in
+        fullscreen, etc.). Display modes correspond to user interface (UI)
+        metaphors and functionality in use on a given platform. The UI
+        conventions of the display modes are purely advisory and implementers
+        are free to interpret them how they best see fit.
       </p>
       <p>
         This specification defines the following [=display modes=]:
@@ -2583,7 +2583,8 @@ <h2>
           buttons or whatever is customary on the platform and user agent.
         </dd>
         <dt>
-          <dfn class="export" data-dfn-for="display mode">browser</dfn> (default)
+          <dfn class="export" data-dfn-for="display mode">browser</dfn>
+          (default)
         </dt>
         <dd>
           Opens the web application using the platform-specific convention for