Refactor the /tags template a bit.

For #185.

src/reader/_app/__init__.py

@@ -402,7 +402,8 @@ def entry():
 @blueprint.route('/tags')
 def tags():
     reader = get_reader()
-    return render_template('tags.html', tags=reader.get_feed_tags())
+    tags = itertools.chain([True, False], reader.get_feed_tags())
+    return render_template('tags.html', tags=tags)
 
 
 form_api = APIThing(blueprint, '/form-api', 'form_api')

src/reader/_app/templates/tags.html

@@ -24,23 +24,16 @@
 
 <ul>
 
-<li>
-    <p>
-        <a href="{{ url_for('.feeds', tags=[true] | tojson) }}">feeds</a> or
-        <a href="{{ url_for('.entries', tags=[true] | tojson) }}">entries</a>
-        with any tags
-<li>
-    <p>
-        <a href="{{ url_for('.feeds', tags=[false] | tojson) }}">feeds</a> or
-        <a href="{{ url_for('.entries', tags=[false] | tojson) }}">entries</a>
-        with no tags
-
 {% for tag in tags %}
 <li id="tag-{{ loop.index }}">
     <p>
         <a href="{{ url_for('.feeds', tags=[tag] | tojson) }}">feeds</a> or
         <a href="{{ url_for('.entries', tags=[tag] | tojson) }}">entries</a>
-        with <span class="tag">{{ tag }}</span>
+        with
+        {% if tag is true %} any tags
+        {% elif tag is false %} no tags
+        {% else %} <span class="tag">{{ tag }}</span>
+        {% endif %}
 {% else %}
 
 {% if not error %}