Switched to using frappe.utils.md_to_html for rendering markdown.

The `markdown` filter doesn't convert to html if there is any html tag in the
input.

community/www/courses/topic.html

@@ -51,7 +51,9 @@
 {% endmacro %}
 
 {% macro render_section_text(s) %}
-  {{ s.contents | markdown  }}
+  <p>BEGIN SECTION</p>
+  {{ frappe.utils.md_to_html(s.contents) }}
+  <p>END SECTION</p>
 {% endmacro %}
 
 {%- block script %}