Do not show the 'Improve this page' button on the genindex page

Author: seisman

doc/_templates/breadcrumbs.html

@@ -18,7 +18,7 @@
                 {% else %}
                     {% set example_script = example_script + ".py" %}
                 {% endif %}
-                {% if pagename.split("/")[-1] != "sg_execution_times" %}
+                {% if pagename.split("/")[-1] not in ["sg_execution_times", "genindex"] %}
                     <a href="https://github.com/{{ github_repo }}/edit/{{ github_version }}/{{ doc_path }}/{{ example_script }}"
                        class="fa fa-github"> Improve this page</a>
                 {% endif %}