Don't concatenate together multiple strings.

cms/templates/settings.html

@@ -190,7 +190,13 @@ from contentstore import utils
                 <li class="field text" id="field-course-overview">
                   <label for="course-overview">${_("Course Overview")}</label>
                   <textarea class="tinymce text-editor" id="course-overview"></textarea>
-                  <span class="tip tip-stacked">${_("Introductions, prerequisites, FAQs that are used on ")}<a class="link-courseURL" rel="external" href="${utils.get_lms_link_for_about_page(course_location)}">${_("your course summary page")}</a>${_(" (formatted in HTML)")}</span>
+                  <%def name='overview_text()'><%
+                    a_link_start = '<a class="link-courseURL" rel="external" href="'
+                    a_link_end = '">' + _("your course summary page") + '</a>'
+                    a_link = a_link_start + utils.get_lms_link_for_about_page(course_location) + a_link_end
+                    text = _("Introductions, prerequisites, FAQs that are used on %s (formatted in HTML)") % a_link
+                    %>${text}</%def>
+                  <span class="tip tip-stacked">${overview_text()}</span>
                 </li>
 
                 <li class="field video" id="field-course-introduction-video">