anchor.diff:                                  <a href="#" class="dropdown-toggle "
                                   data-toggle="dropdown" role="button"
                                   aria-haspopup="true"
  -                                aria-expanded="false">Developers<span
  +                                aria-expanded="false"style="text-align:center">
  +                                Developer <br>Tutorials<span
                                   class="caret"></span></a>
                                   <ul class="dropdown-menu">
                                       <li> <%= link_to "Building an LTI Tool
  
positive.code:                     <div id="navbar" class="navbar-collapse collapse">
                          <ul class="nav navbar-nav">
                              <li><a href="http://cssplice.org" target="_blank"
                                 class="">SPLICE Home</a></li>
                              <li class=" dropdown">
                                  <a href="#" class="dropdown-toggle "
                                  data-toggle="dropdown" role="button"
                                  aria-haspopup="true" aria-expanded="false">LTI
                                  <span class="caret"></span></a>
                                  <ul class="dropdown-menu">
                                      <li> <%= link_to "About",  lti_path %></li>
  
negative.code:                                     <li> <%= link_to "LTI in OpenDSA -
                                      Instructors",  lti_opendsa_instructor_path
                                      %></li>
                                  </ul>
                              </li>
                              <li class=" dropdown">
                                  <a href="#" class="dropdown-toggle "
                                  data-toggle="dropdown" role="button"
                                  aria-haspopup="true"
                                  aria-expanded="false" style="text-align:center">
                                  User <br>Examples<span class="caret"></span></a>
                                  <ul class="dropdown-menu">
                                    <li> <%= link_to "Add OpenDSA Exercises to
                                    Canvas", lti_instructions_opendsa_path
                                    %></li>
                                    <li>
                                      <%= link_to "Add OpenDSA Book Instance to
                                      Canvas",
                                    lti_instructions_opendsa_book_instance_path
                                    %></li>
                                    <li> <%= link_to "Add OpenDSA Exercises to
                                    Moodle", lti_instructions_opendsa_moodle_path
                                    %></li>
                                  </ul>
                              </li>
                              <li class=" dropdown">
                                  <a href="#" class="dropdown-toggle "
                                  data-toggle="dropdown" role="button"
                                  aria-haspopup="true"
                                  aria-expanded="false" style="text-align:center">
                                  Caliper <br>Analytics<span
                                  class="caret"></span></a>
                                  <ul class="dropdown-menu">
                                    <li> <%= link_to "Introduction",  caliper_path
  