chore(docs): update template in docs (#565)

The template displayed in the *Customize your RevealJS slides* was out of sync.

CHANGELOG.md

@@ -15,6 +15,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 - Update the comparison table in the README.
   [#560](https://github.com/jeertmans/manim-slides/pull/560)
+- Update the template in the *Customize your RevealJS slides* section.
+  [#565](https://github.com/jeertmans/manim-slides/pull/565)
 
 (v5.5.2)=
 ## [v5.5.2](https://github.com/jeertmans/manim-slides/compare/v5.5.1...v5.5.2)

docs/source/_static/template.html

@@ -50,11 +50,11 @@
     </div>
 
     <script src="https://cdnjs.cloudflare.com/ajax/libs/reveal.js/{{ reveal_version }}/reveal.min.js"></script>
+    <script src="https://cdnjs.cloudflare.com/ajax/libs/reveal.js/{{ reveal_version }}/plugin/notes/notes.min.js"></script>
 
     <!-- To include plugins, see: https://revealjs.com/plugins/ -->
     {% if has_notes %}
-      <script src="https://cdnjs.cloudflare.com/ajax/libs/reveal.js/{{ reveal_version }}/plugin/markdown/markdown.min.js"></script>
+    <script src="https://cdnjs.cloudflare.com/ajax/libs/reveal.js/{{ reveal_version }}/plugin/markdown/markdown.min.js"></script>
-      <script src="https://cdnjs.cloudflare.com/ajax/libs/reveal.js/{{ reveal_version }}/plugin/notes/notes.min.js"></script>
     {% endif %}
 
     <!-- <script src="index.js"></script> -->
@@ -262,6 +262,23 @@
         // Time before the cursor is hidden (in ms)
         hideCursorTime: {{ hide_cursor_time }}
       });
+      // Override SPACE to play / pause the video
+      Reveal.addKeyBinding(
+        {
+          keyCode: 32,
+          key: 'SPACE',
+          description: 'Play / pause video'
+        },
+        () => {
+          var currentVideos = Reveal.getCurrentSlide().slideBackgroundContentElement.getElementsByTagName("video");
+          if (currentVideos.length > 0) {
+            if (currentVideos[0].paused == true) currentVideos[0].play();
+            else currentVideos[0].pause();
+          } else {
+            Reveal.next();
+          }
+        }
+      );
       {% if one_file %}
       // Fix found by @t-fritsch and @Rapsssito on GitHub
       // see: https://github.com/hakimel/reveal.js/discussions/3362#discussioncomment-11733074.
@@ -306,6 +323,13 @@
       Reveal.on( 'ready', fixBase64VideoBackground );
       {% endif %}
     </script>
+    {% if env['READTHEDOCS'] %}
+      <style>
+        readthedocs-flyout, readthedocs-notification {
+          display: none;
+        }
+      </style>
+    {% endif %}
 
     <!-- Add a clock to each section dynamically using JavaScript -->
     <script>