Only show comparison link for >2 commits #1110

We can look at the PushCommits object to see how many commits were
included in a commit, and add some template logic to only show the
comparison link when there are at least 2 commits in a push. We also
correct the link to display the number of commits.

conf/locale/locale_de-DE.ini

@@ -1018,7 +1018,7 @@ comment_issue=`hat Issue <a href="%s/issues/%s">%s#%[2]s</a> kommentiert`
 merge_pull_request=`Pull-Request <a href="%s/pulls/%s">%s#%[2]s</a> zuammengeführt`
 transfer_repo=hat Repository <code>%s</code> transferiert an <a href="%s">%s</a>
 push_tag=hat nach <a href="%s/src/%s">%[2]s</a> in <a href="%[1]s">%[3]s</a> gepusht
-compare_2_commits=Zeige Vergleich dieser 2 Commits
+compare_commits=Zeige Vergleich dieser %d Commits
 
 [tool]
 ago=vor