Update subtitle behaviour:

- on Book
	- Remove problematic punctuation (locale and multiple punctuation if the title ends with `?`, `!` or similar).
	- Update view.
	- Use proper semantic to split combined title into `name`, `alternativeHeadline` and series-related microdata.
	- The author is not a subtitle, just data.
- Use parenthesis in the `get_title` filter instead of punctuation.

bookwyrm/templates/book/book.html

@@ -8,28 +8,35 @@
 <div class="block" itemscope itemtype="https://schema.org/Book">
     <div class="columns is-mobile">
         <div class="column">
-            <h1 class="title">
-                <span itemprop="name">
-                    {{ book.title }}{% if book.subtitle %}:
-                        <small>{{ book.subtitle }}</small>
+            <h1 class="title" itemprop="name">
+                {{ book.title }}
+            </h1>
+
+            {% if book.subtitle or book.series %}
+                <p class="subtitle">
+                    {% if book.subtitle %}
+                        <meta
+                            itemprop="alternativeHeadline"
+                            content="{{ book.subtitle | escape }}"
+                        >
+
+                        {{ book.subtitle }}
                     {% endif %}
-                </span>
 
-                {% if book.series %}
-                    <meta itemprop="isPartOf" content="{{ book.series }}">
-                    <meta itemprop="volumeNumber" content="{{ book.series_number }}">
+                    {% if book.series %}
+                        <meta itemprop="isPartOf" content="{{ book.series | escape }}">
+                        <meta itemprop="volumeNumber" content="{{ book.series_number }}">
 
-                    <small class="has-text-grey-dark">
                         ({{ book.series }}
                         {% if book.series_number %} #{{ book.series_number }}{% endif %})
-                    </small>
-                    <br>
-                {% endif %}
-            </h1>
+                    {% endif %}
+                </p>
+            {% endif %}
+
             {% if book.authors %}
-            <h2 class="subtitle">
-            {% trans "by" %} {% include 'snippets/authors.html' with book=book %}
-            </h2>
+                <div>
+                    {% trans "by" %} {% include 'snippets/authors.html' with book=book %}
+                </div>
             {% endif %}
         </div>
 

bookwyrm/templatetags/utilities.py

@@ -25,7 +25,7 @@ def get_title(book):
         return ""
     title = book.title
     if len(title) < 6 and book.subtitle:
-        title = "{:s}: {:s}".format(title, book.subtitle)
+        title = "{:s} ({:s})".format(title, book.subtitle)
     return title