修复课程讨论区帖子主题问题，修复主题后面空白过多的问题；

app/views/messages/_course_show.html.erb

@@ -96,9 +96,9 @@
   <div class="memo-section">
     <div class="memo-title <%= @topic.sticky? ? 'sticky' : '' %> <%= @topic.locked? ? 'locked' : '' %>">
       <% if @project %>
-          <%= label_tag l(:field_subject) %>: <%= link_to @topic.subject, project_boards_path(@topic.project) %>
+          <%= label_tag l(:field_subject) %>: <%= link_to @topic.subject.truncate(24, omission: '...'), project_boards_path(@topic.project),title: @topic.subject.to_s %>
       <% elsif @course %>
-          <%= label_tag l(:field_subject) %>: <%= link_to @topic.subject, course_boards_path(@topic.course) %>
+          <%= label_tag l(:field_subject) %>: <%= link_to @topic.subject.truncate(24,omission:'...'), course_boards_path(@topic.course),title: @topic.subject.to_s %>
       <% end %>
     </div>
     <div class="memo-content">
@@ -109,14 +109,8 @@
     </div>
     <div class="memo-timestamp">
       <div style="float: left"><%= authoring @topic.created_on, @topic.author %></div>
-
-
       <div style="float: right"><%= toggle_link l(:button_reply), "reply", :focus => 'message_content' %></div>
     </div>
-
-
-
-
   </div>
   <br />
 </div>

app/views/messages/_project_show.html.erb

@@ -97,9 +97,9 @@
   <div class="memo-section" style="width: 100%;word-break: break-all;">
     <div class="memo-title <%= @topic.sticky? ? 'sticky' : '' %> <%= @topic.locked? ? 'locked' : '' %>" style="width: 83%;word-break: break-all;">
       <% if @project %>
-          <%= label_tag l(:field_subject) %>: <%= link_to @topic.subject.truncate(20, omission: '...'), project_boards_path(@topic.project),title: @topic.subject.to_s %>
+          <%= label_tag l(:field_subject) %>: <%= link_to @topic.subject.truncate(24, omission: '...'), project_boards_path(@topic.project),title: @topic.subject.to_s %>
       <% elsif @course %>
-          <%= label_tag l(:field_subject) %>: <%= link_to @topic.subject.truncate(20,omission:'...'), course_boards_path(@topic.course),title: @topic.subject.to_s %>
+          <%= label_tag l(:field_subject) %>: <%= link_to @topic.subject.truncate(24,omission:'...'), course_boards_path(@topic.course),title: @topic.subject.to_s %>
       <% end %>
     </div>
     <div class="memo-content">