Merge pull request #21440 from appsembler/omar/document-prev-next

Allow correct gender translations for course unit prev/next buttons

lms/templates/seq_module.html

 <%page expression_filter="h"/>
-<%! from django.utils.translation import ugettext as _ %>
+<%! from django.utils.translation import pgettext, ugettext as _ %>
 
 <div id="sequence_${element_id}" class="sequence" data-id="${item_id}"
      data-position="${position}" data-ajax-url="${ajax_url}"
@@ -22,10 +22,12 @@
   <div class="sequence-nav">
     <button class="sequence-nav-button button-previous">
       <span class="icon fa fa-chevron-prev" aria-hidden="true"></span>
-      <span class="sequence-nav-button-label">${_('Previous')}</span>
+      ## Translators: A button for showing the Previous Unit
+      <span class="sequence-nav-button-label">${pgettext('unit', 'Previous')}</span>
     </button>
     <button class="sequence-nav-button button-next">
-      <span class="sequence-nav-button-label">${_('Next')}</span>
+      ## Translators: A button for showing the Next Unit
+      <span class="sequence-nav-button-label">${pgettext('unit', 'Next')}</span>
       <span class="icon fa fa-chevron-next" aria-hidden="true"></span>
     </button>
     <nav class="sequence-list-wrapper" aria-label="${_('Sequence')}">
@@ -88,10 +90,12 @@
   <nav class="sequence-bottom" aria-label="${_('Section')}">
     <button class="sequence-nav-button button-previous">
       <span class="icon fa fa-chevron-prev" aria-hidden="true"></span>
-      <span>${_('Previous')}</span>
+      ## Translators: A button for showing the Previous Unit
+      <span>${pgettext('unit', 'Previous')}</span>
     </button>
     <button class="sequence-nav-button button-next">
-      <span>${_('Next')}</span>
+      ## Translators: A button for showing the Next Unit
+      <span>${pgettext('unit', 'Next')}</span>
       <span class="icon fa fa-chevron-next" aria-hidden="true"></span>
     </button>
   </nav>