邮件通知：issue":用issue 标题 替换提示语

app/views/mailer/send_for_user_activities.html.erb

@@ -225,7 +225,7 @@
                               :style => "color:#2E8DD7; float:left;display:block; margin-right:5px; margin-left:5px;  overflow:hidden; white-space: nowrap; text-overflow:ellipsis;"%>
                   <span class="wmail_txt" style="float:left; margin-right:5px;color:#ACAEB1;"><%= l(:label_project_issue_update) %></span>
                   <% if issues_journal.notes.blank? || issues_journal.notes.nil? %>
-                      <%= link_to truncate(l(:label_isuue_mail_status),length: 30,omission: '...'),issue_url(issues_journal.issue,  :token => @token.value),
+                      <%= link_to truncate(issues_journal.issue.subject.html_safe, length: 30,omission: '...'),issue_url(issues_journal.issue,  :token => @token.value),
                                   :style => "color:#2E8DD7;float:left; font-weight:normal;margin-right:5px; display:block;overflow:hidden; white-space: nowrap; text-overflow:ellipsis;" %>
                   <% else %>
                       <%= link_to truncate(issues_journal.notes.html_safe, length: 30,omission: '...'),issue_url(issues_journal.issue,  :token => @token.value),