bring back the serial commas

Author: ivanov

index.html

@@ -42,7 +42,7 @@
         <div class="row">
             <div class="col-md-12">
                 <div class="col-md-8 col-md-offset-2">
-                <h4 class="jumbotron-text">Project Jupyter develops open-source software, open standards
+                <h4 class="jumbotron-text">Project Jupyter develops open-source software, open standards,
                     and services for interactive computing across dozens of programming languages.</h4>
                 </div>
              </div>
@@ -59,7 +59,7 @@ <h4 class="jumbotron-text">Project Jupyter develops open-source software, open s
                     </div>
                     <div class="col-md-6 nb-highlight-text">
                         <h3>JupyterLab: A Next-Generation Notebook Interface</h3>
-                        <h4 class="nb-desc">JupyterLab is a web-based interactive development environment for notebooks, code and data. Its flexible interface allows users to configure and arrange workflows in data science, scientific computing, computational journalism and machine learning. A modular design allows for extensions that expand and enrich functionality.</h4>
+                        <h4 class="nb-desc">JupyterLab is a web-based interactive development environment for notebooks, code, and data. Its flexible interface allows users to configure and arrange workflows in data science, scientific computing, computational journalism, and machine learning. A modular design allows for extensions that expand and enrich functionality.</h4>
                         <div class="button-container">
                             <a class="orange-button" href="try">Try it in your browser</a>
                             <a class="orange-button install-button" href="install.html">Install JupyterLab</a>
@@ -81,7 +81,7 @@ <h4 class="nb-desc">JupyterLab is a web-based interactive development environmen
                     <div class="col-md-6 nb-highlight-text">
                         <h3>Jupyter Notebook: The Classic Notebook Interface</h3>
                         <h4 class="nb-desc">The Jupyter Notebook is a web application for creating and sharing
-                            documents that contain code, visualizations and text. It can be used for data science, statistical modeling, machine learning and much more.</h4>
+                            documents that contain code, visualizations, and text. It can be used for data science, statistical modeling, machine learning, and much more.</h4>
                         <div class="button-container">
                             <a class="orange-button" href="try">Try it in your browser</a>
                             <a class="orange-button install-button" href="install.html">Install the Notebook</a>