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_zh-CN.ini

@@ -1018,7 +1018,7 @@ comment_issue=`评论了工单 <a href="%s/issues/%s">%s#%[2]s</a>`
 merge_pull_request=`合并了合并请求 <a href="%s/pulls/%s">%s#%[2]s</a>`
 transfer_repo=将仓库 <code>%s</code> 转移至 <a href="%s">%s</a>
 push_tag=推送了标签 <a href="%s/src/%s">%[2]s</a> 到 <a href="%[1]s">%[3]s</a>
-compare_2_commits=查看 2 次提交的内容对比
+compare_commits=查看 %d 次提交的内容对比
 
 [tool]
 ago=之前