Renamed post-header to post_header

source/_partials/post_header.html.twig

@@ -0,0 +1,12 @@
+{% set title_tag = title_tag|default('h1') %}
+<{{ title_tag }}>{{ page.title }}</{{ title_tag }}>
+
+<p class="posted">Posted: {{ page.date|date('jS F Y') }}</p>
+{#
+{% if page.tags %}
+  Tags:
+  {% for tag in page.tags %}
+    {{ tag }}{% if not loop.last %},{% else %}.{% endif %}
+  {% endfor %}
+{% endif %}
+#}