fix misspelling setting parameter name

main/install/configuration.dist.php

@@ -2015,7 +2015,7 @@ VALUES (21, 13, 'send_notification_at_a_specific_date', 'Send notification at a
 //$_configuration['extldap_config'] = ['host' => '', 'port' => ''];
 
 // Option to hide the teachers info on courses about info page.
-//$_configuration['course_about_teacher_name_hiden'] = false;
+//$_configuration['course_about_teacher_name_hide'] = false;
 
 // KEEP THIS AT THE END
 // -------- Custom DB changes

main/template/default/course_home/about.tpl

@@ -1,7 +1,7 @@
 <div id="about-course">
     <div id="course-info-top">
         <h2 class="session-title">{{ course.title }}</h2>
-        {% if not 'course_about_teacher_name_hiden'|api_get_configuration_value %}
+        {% if not 'course_about_teacher_name_hide'|api_get_configuration_value %}
             <div class="course-short">
                 <ul>
                     <li class="author">{{ "Professors"|get_lang }}</li>
@@ -178,7 +178,7 @@
                     </div>
                 </div>
                 {% endif %}
-                {% if course.teachers and not 'course_about_teacher_name_hiden'|api_get_configuration_value %}
+                {% if course.teachers and not 'course_about_teacher_name_hide'|api_get_configuration_value %}
                     <div class="panel panel-default">
                         <div class="panel-body">
                             <div class="panel-teachers">