Remove extra braces that were causing mako syntax errors

lms/templates/gradebook.html

@@ -61,8 +61,8 @@
       %for student in students:
       <tr>
         <td><a href="${reverse('student_profile',
-                               kwargs={'course_id' : course_id,
-                                       'student_id': student['id']})}">
+                               kwargs=dict(course_id=course_id,
+                                           student_id=student['id']))}">
                       ${student['username']}</a></td>
         %for section in student['grade_summary']['section_breakdown']:
           ${percent_data( section['percent'] )}

lms/templates/instructor_dashboard.html

@@ -14,10 +14,10 @@
     <h1>Instructor Dashboard</h1>
 
     <p>
-    <a href="${reverse('gradebook', kwargs={'course_id': course.id})}">Gradebook</a>
+    <a href="${reverse('gradebook', kwargs=dict(course_id=course.id))}">Gradebook</a>
 
     <p>
-    <a href="${reverse('grade_summary', kwargs={'course_id': course.id})}">Grade summary</a>
+    <a href="${reverse('grade_summary', kwargs=dict(course_id=course.id))}">Grade summary</a>
 
   </section>
 </div>

lms/templates/profile.html

@@ -137,7 +137,7 @@ $(function() {
               percentageString = "{0:.0%}".format( float(earned)/total) if earned > 0 and total > 0 else ""
               %>
 
-              <h3><a href="${reverse('courseware_section', kwargs={'course_id' : course.id, 'chapter' : chapter['url_name'], 'section' : section['url_name']})}">
+              <h3><a href="${reverse('courseware_section', kwargs=dict(course_id=course.id, chapter=chapter['url_name'], section=section['url_name']))}">
                 ${ section['display_name'] }</a><span> ${"({0:.3n}/{1:.3n}) {2}".format( float(earned), float(total), percentageString )}</span></h3>
               <p>
                 ${section['format']}