Use a more consistent towncrier template

towncrier/template.md

@@ -6,27 +6,10 @@
 
 {% if sections[section] %}
 {% for category, val in definitions.items() if category in sections[section]%}
-{{ definitions[category]['name'] }}
-{{ underline * definitions[category]['name']|length }}
-{% if definitions[category]['showcontent'] %}
 {% for text, values in sections[section][category].items() %}
-- {{ text }} ({{ values|join(', ') }})
+- {{ definitions[category]['name'] }}: {{ text }} ({{ values|join(', ') }})
+{% endfor %}
 {% endfor %}
 
-{% else %}
-- {{ sections[section][category]['']|join(', ') }}
-
 {% endif %}
-{% if sections[section][category]|length == 0 %}
-No significant changes.
-
-{% else %}
-{% endif %}
-
 {% endfor %}
-{% else %}
-No significant changes.
-
-
-{% endif %}
-{% endfor %}