(at least then let's get Edit and History next to each other as custom; .plainlinks was pointlessly duplicated; newlines for clearer code; Help:Variable: Don't use PAGENAMEE in fullurl)
<div id="template_doc_page_transcluded" class="dablink">This [[Wikipedia:Template documentation|documentation]] is [[Wikipedia:Transclusion|transcluded]] from [[{{{1|{{FULLPAGENAME}}/doc}}}]]. {{#ifexist: {{#rel2abs: /sandbox }} | {{#ifexist: {{#rel2abs: /testcases}} | <br> This template has a [[/sandbox|sandbox]] ''([{{fullurl:{{FULLPAGENAME}}/sandbox|action=edit}} edit])'' and [[/testcases|testcases]] for editors to experiment.}}<!-- else don't show when just 1 of /sandbox or /testcases exists -->}} </div>{{{{{1|{{SUBJECTPAGENAME}}/doc}}}}} <br style="clear:both;" /></div>