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_fr-FR.ini

@@ -1018,7 +1018,7 @@ comment_issue=`a commenté le problème <a href="%s/issues/%s">%s#%[2]s</a>`
 merge_pull_request=`pull request fusionné le <a href="%s/pulls/%s">%s#%[2]s</a>`
 transfer_repo=a transféré le dépôt <code>%s</code> à <a href="%s">%s</a>
 push_tag=a soumis le tag <a href="%s/src/%s">%[2]s</a> à <a href="%[1]s">%[3]s</a>
-compare_2_commits=Comparer ces 2 commits
+compare_commits=Comparer ces %d commits
 
 [tool]
 ago=auparavant