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_bg-BG.ini

@@ -1018,7 +1018,7 @@ comment_issue=`коментира проблем <a href="%s/issues/%s">%s#%[2]s
 merge_pull_request=`обедини заявка за сливане <a href="%s/pulls/%s">%s#%[2]s</a>`
 transfer_repo=прехвърли хранилище <code>%s</code> към <a href="%s">%s</a>
 push_tag=предаде маркер <a href="%s/src/%s">%[2]s</a> към <a href="%[1]s">[3]s</a>
-compare_2_commits=Сравнение между тези 2 ревизии
+compare_commits=Сравнение между тези %d ревизии
 
 [tool]
 ago=преди