Index: templates/sidebar.html
===================================================================
--- templates/sidebar.html	(revision 59b2e9cdcf9053e1764ec21a504c56b5f7ef7aba)
+++ templates/sidebar.html	(revision 75ea229d549bcf10342f483dbb27e69334411131)
@@ -1,7 +1,9 @@
-<div class="h-100 d-flex flex-column flex-shrink-0 p-3 bg-light-subtle border border-2 border-secondary-subtle rounded-end-5" style="width: 250px;">
+<div class="h-100 d-flex flex-column flex-shrink-0 p-3 bg-light-subtle border border-2 border-secondary-subtle rounded-end-5"
+     style="width: 250px;">
     <h4 class="mb-4">Menu</h4>
     <ul class="nav nav-pills flex-column mb-auto">
         <li class="nav-item">
-            <a href="{% url 'album_list' %}" class="nav-link {% if request.path == '/album/' %}active{% endif %}" aria-current="page">
+            <a href="{% url 'album_list' %}" class="nav-link {% if request.path == '/album/' %}active{% endif %}"
+               aria-current="page">
                 Album List
             </a>
@@ -13,19 +15,4 @@
         </li>
         <li class="nav-item">
-            <a href="{% url 'avg_track_duration' %}" class="nav-link {% if request.path == '/artist/avg-track-duration' %}active{% endif %}">
-                Average Track Duration
-            </a>
-        </li>
-        <li class="nav-item">
-            <a href="{% url 'avg_track_price' %}" class="nav-link {% if request.path == '/artist/avg-track-price' %}active{% endif %}">
-                Average Track Price per Artist
-            </a>
-        </li>
-        <li class="nav-item">
-            <a href="{% url 'rank_list_artists' %}" class="nav-link {% if request.path == '/artist/most-popular' %}active{% endif %}">
-                Artist with Highest Earnings
-            </a>
-        </li>
-        <li class="nav-item">
             <a href="{% url 'track_list' %}" class="nav-link {% if request.path == '/track/' %}active{% endif %}">
                 Track List
@@ -33,35 +20,61 @@
         </li>
         <li class="nav-item">
-            <a href="{% url 'genres_per_customer' %}" class="nav-link {% if request.path == '/customer/genres-per-customer' %}active{% endif %}">
+            <a href="{% url 'avg_track_duration' %}"
+               class="nav-link {% if request.path == '/artist/avg-track-duration' %}active{% endif %}">
+                Average Track Duration
+            </a>
+        </li>
+        <li class="nav-item">
+            <a href="{% url 'avg_track_price' %}"
+               class="nav-link {% if request.path == '/artist/avg-track-price' %}active{% endif %}">
+                Average Track Price per Artist
+            </a>
+        </li>
+        <li class="nav-item">
+            <a href="{% url 'rank_list_artists' %}"
+               class="nav-link {% if request.path == '/artist/most-popular' %}active{% endif %}">
+                Artist with Highest Earnings
+            </a>
+        </li>
+        <li class="nav-item">
+            <a href="{% url 'track_count_per_genre' %}"
+               class="nav-link {% if request.path == '/track/per-genre' %}active{% endif %}">
+                Track Count per Genre
+            </a>
+        </li>
+        <li class="nav-item">
+            <a href="{% url 'rank_list_most_active_customers' %}"
+               class="nav-link {% if request.path == '/customer/rank-list' %}active{% endif %}">
+                Rank List of Most Active Customers
+            </a>
+        </li>
+        <li class="nav-item">
+            <a href="{% url 'media_type_percentage' %}"
+               class="nav-link {% if request.path == '/media-type/percentage' %}active{% endif %}">
+                Media Type Percentage
+            </a>
+        </li>
+        <li class="nav-item">
+            <a href="{% url 'most_listened_genre_per_customer' %}"
+               class="nav-link {% if request.path == '/customer/most-popular-genre-per-customer' %}active{% endif %}">
+                Most Popular Genre per Customer
+            </a>
+        </li>
+        <li class="nav-item">
+            <a href="{% url 'genres_per_customer' %}"
+               class="nav-link {% if request.path == '/customer/genres-per-customer' %}active{% endif %}">
                 Genres per Customer
             </a>
         </li>
         <li class="nav-item">
-            <a href="{% url 'invoice_per_customer_after_date' %}" class="nav-link {% if request.path == '/customer/invoices-per-customer' %}active{% endif %}">
+            <a href="{% url 'invoice_per_customer_after_date' %}"
+               class="nav-link {% if request.path == '/customer/invoices-per-customer' %}active{% endif %}">
                 Invoices per Customer
             </a>
         </li>
+
         <li class="nav-item">
-            <a href="{% url 'most_listened_genre_per_customer' %}" class="nav-link {% if request.path == '/customer/most-popular-genre-per-customer' %}active{% endif %}">
-                Most Popular Genre per Customer
-            </a>
-        </li>
-        <li class="nav-item">
-            <a href="{% url 'media_type_percentage' %}" class="nav-link {% if request.path == '/media-type/percentage' %}active{% endif %}">
-                Media Type Percentage
-            </a>
-        </li>
-        <li class="nav-item">
-            <a href="{% url 'track_count_per_genre' %}" class="nav-link {% if request.path == '/track/per-genre' %}active{% endif %}">
-                Track Count per Genre
-            </a>
-        </li>
-        <li class="nav-item">
-            <a href="{% url 'rank_list_most_active_customers' %}" class="nav-link {% if request.path == '/customer/rank-list' %}active{% endif %}">
-                Rank List of Most Active Customers
-            </a>
-        </li>
-     <li class="nav-item">
-            <a href="{% url 'most_popular_artist_per_customer_per_genre' %}" class="nav-link {% if request.path == '/customer/artist-per-genre' %}active{% endif %}">
+            <a href="{% url 'most_popular_artist_per_customer_per_genre' %}"
+               class="nav-link {% if request.path == '/customer/artist-per-genre' %}active{% endif %}">
                 Most Popular Artists Per Customer
             </a>
