Fix links in EmailsOnPush text version.

app/views/notify/repository_push_email.text.haml

-#{@author.name} pushed to #{@branch} at #{link_to @project.name_with_namespace, namespace_project_url(@project.namespace, @project)}
+#{@author.name} pushed to #{@branch} at #{@project.name_with_namespace}
 
 \
 Commits:
 - @commits.each do |commit|
-  #{link_to commit.short_id, namespace_project_commit_url(@project.namespace, @project, commit)} by #{commit.author_name}
+  #{commit.short_id} by #{commit.author_name}
   #{commit.safe_message}
   \- - - - -
 \
@@ -38,3 +38,6 @@ Commits:
   \
   \
   Huge diff. To prevent performance issues it was hidden
+\
+\
+View it on GitLab: #{@target_url}