Only one link per email to prevent clicking the wrong one.

app/views/layouts/notify.html.haml

@@ -21,6 +21,6 @@
         \—
         %br
         - if @project
-          You're receiving this notification because you are a member of the #{link_to @project.name_with_namespace, project_url(@project)} project team.
+          You're receiving this notification because you are a member of the #{link_to_unless @target_url, @project.name_with_namespace, project_url(@project)} project team.
         - if @target_url
           #{link_to "View it on GitLab", @target_url}