Fix titles and headings (alshedivat#204)

* Update head.html

* Update header.html

* Update head.html

* Update header.html

* Update about.html

Co-authored-by: Maruan <alshedivat@users.noreply.github.com>

Author: akindofyoga

_includes/head.html

@@ -2,7 +2,7 @@
 <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
 <meta http-equiv="X-UA-Compatible" content="IE=edge">
 
-<title>{% if site.title == blank %}{{ site.title }}{% else %}{{ site.first_name }} {{ site.middle_name }} {{ site.last_name }}{% endif %}{% if page.title and page.url != "/" %} | {{ page.title }}{% endif %}</title>
+<title>{% if site.title == "blank" %}{{ site.first_name }} {{ site.middle_name }} {{ site.last_name }}{% else %}{{ site.title }}{% endif %}{% if page.title and page.url != "/" %} | {{ page.title }}{% endif %}</title>
 <meta name="description" content="{{ site.description }}">
 
 <!-- Open Graph -->

_includes/header.html

@@ -5,7 +5,7 @@
     <div class="container">
       {% if page.title != "about" %}
       <a class="navbar-brand title font-weight-lighter" href="{{ site.baseurl | prepend: site.url }}/">
-       {% if site.title == blank %}{{ site.title }}{% else %}<span class="font-weight-bold">{{ site.first_name }}</span> {{ site.middle_name }}  {{ site.last_name }}{% endif %}
+       {% if site.title == "blank" %}<span class="font-weight-bold">{{ site.first_name }}</span> {{ site.middle_name }}  {{ site.last_name }}{% else %}{{ site.title }}{% endif %}
       </a>
       {% elsif site.show_social_icons %}
         <!-- Social Icons -->

_layouts/about.html

@@ -6,7 +6,7 @@
 
   <header class="post-header">
     <h1 class="post-title">
-     {% if site.title == blank %}{{ site.title }}{% else %}<span class="font-weight-bold">{{ site.first_name }}</span> {{ site.middle_name }}  {{ site.last_name }}{% endif %}
+     {% if site.title == "blank" %}<span class="font-weight-bold">{{ site.first_name }}</span> {{ site.middle_name }} {{ site.last_name }}{% else %}{{ site.title }}{% endif %}
     </h1>
      <p class="desc">{{ page.description }}</p>
   </header>