HTML changes to make it more compliant with the standard (less complains from validator.w3.org)

django/allgo/templates/base.html

@@ -11,10 +11,10 @@
     <meta name="description" content="allgo allow you to use console applications made by research team, online." />
     <meta name="viewport" content="width=device-width, initial-scale=1.0, shrink-to-fit=no">
 
-    <link rel="stylesheet" type="text/css" href="{% static 'css/bootstrap.min.css' %}" media="all" charset="utf-8">
-    <link rel="stylesheet" type="text/css" href="{% static 'css/fontawesome-all.min.css' %}" media="all" charset="utf-8">
-    <link rel="stylesheet" type="text/css" href="{% static 'css/allgo.css' %}" media="all" charset="utf-8">
-    <link rel="stylesheet" type="text/css" href="{% static 'css/prism.css' %}" media="all" charset="utf-8">
+    <link rel="stylesheet" type="text/css" href="{% static 'css/bootstrap.min.css' %}" media="all">
+    <link rel="stylesheet" type="text/css" href="{% static 'css/fontawesome-all.min.css' %}" media="all">
+    <link rel="stylesheet" type="text/css" href="{% static 'css/allgo.css' %}" media="all">
+    <link rel="stylesheet" type="text/css" href="{% static 'css/prism.css' %}" media="all">
 
     <link rel="icon" type="image/png" href="{% static 'images/favicon.ico' %}" sizes="16x16">
     {% endblock %}

django/allgo/templates/partials/_footer.html

@@ -41,8 +41,8 @@
       </div>
     </div>
     <div class="logos">
-    <a href="https://inria.fr"><img class="float-left" src="{% static 'images/inria.png' %}"></a>
-    <a href="https://www.irisa.fr"><img class="float-right" src="{% static 'images/irisa.png' %}"></a>
+    <a href="https://inria.fr"><img class="float-left" src="{% static 'images/inria.png' %}" alt="inria logo"></a>
+    <a href="https://www.irisa.fr"><img class="float-right" src="{% static 'images/irisa.png' %}" alt="irisa logo"></a>
     </div>
   </div>
 </footer>

django/allgo/templates/partials/_header.html

@@ -4,7 +4,7 @@
   <div class="container">
     <nav class="navbar navbar-expand-xl navbar-dark bg-dark">
       <a class="navbar-brand text-hide" href="{% url 'main:home' %}">
-        <img src="{% static "images/logo-allgo.png" %}" width="50px" height="50px" alt="allgo logo">A||go</a>
+        <img src="{% static "images/logo-allgo.png" %}" width=50 height=50 alt="allgo logo">A||go</a>
       <button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarNav" aria-controls="navbarNav" aria-expanded="false" aria-label="Toggle navigation">
         <span class="navbar-toggler-icon"></span>
       </button>

django/allgo/templates/webapp_detail.html

@@ -209,8 +209,6 @@
         </div>
         {% endif %}
       </div>
-
-    </div>
   </div>
 </div>
 {% endblock %}