更改
use unnamed param; seems simplest way to do this
{{ {{{|safesubst:}}}#invoke:Unsubst||date=__DATE__ |$B=
<!--{{Off topic}} begin-->{{Ambox
| subst = <includeonly>{{subst:</includeonly><includeonly>substcheck}}</includeonly>
| type = content
| issue = This section '''may [[Wikipedia:Guide to writing better articles#Stay on topic|stray from the topic]] of the article'''{{#if:{{{1|}}}| into the topic of another article, ''[[{{{1}}}]]''}}.
| fix = Please help [{{fullurl:{{FULLPAGENAME}}|action=edit}} improve this section] or discuss this issue on the [[{{TALKPAGENAME}}#{{{2|}}}|talk page]].
| date = {{{date|}}}
| cat = Wikipedia articles that may have off-topic sections
| all = All articles that may have off-topic sections
| name = Off topic
}}<!--{{Off topic}} end-->
}}<noinclude>
{{Documentation}}
</noinclude>
<!--{{Off topic}} begin-->{{Ambox
| subst = <includeonly>{{subst:</includeonly><includeonly>substcheck}}</includeonly>
| type = content
| issue = This section '''may [[Wikipedia:Guide to writing better articles#Stay on topic|stray from the topic]] of the article'''{{#if:{{{1|}}}| into the topic of another article, ''[[{{{1}}}]]''}}.
| fix = Please help [{{fullurl:{{FULLPAGENAME}}|action=edit}} improve this section] or discuss this issue on the [[{{TALKPAGENAME}}#{{{2|}}}|talk page]].
| date = {{{date|}}}
| cat = Wikipedia articles that may have off-topic sections
| all = All articles that may have off-topic sections
| name = Off topic
}}<!--{{Off topic}} end-->
}}<noinclude>
{{Documentation}}
</noinclude>