Changes
moved view/edit/history links to "transcluded from..." line, + redundant "[edit]" link beside fake header as that is the intuitive place
<div class="template-documentation">
<div style="padding-bottom:3px; {{#if:{{{heading|defaultnotblank}}}|border-bottom:1px solid #aaa;}} margin-bottom:1ex;">
<span class="editsection plainlinks">[[[{{{1|{{SUBJECTPAGENAME}}/doc}}}|view]]][[{{fullurl:{{{1|{{SUBJECTPAGENAME}}/doc}}}|action=edit{{#ifexist: {{{1|{{SUBJECTSPACE}}:{{SUBJECTPAGENAME}}/doc}}} ||&preload=Template:Documentation/preload}}}} edit]][[{{fullurl:{{{1|{{SUBJECTPAGENAME}}/doc}}}|action=history}} history]]</span>
<span style="font-size: 150%">{{{heading|Documentation}}}</span></div>
<div id="template_doc_page_transcluded" class="dablinkplainlinks">This [[Wikipedia:Template documentation|documentation]] is [[Wikipedia:Transclusion|transcluded]] from [[{{{1|{{FULLPAGENAME}}/doc}}}]]([[{{{1|{{SUBJECTPAGENAME}}/doc}}}|view]]|[{{fullurl:{{{1|{{SUBJECTPAGENAME}}/doc}}}|action=edit{{#ifexist: {{{1|{{SUBJECTSPACE}}:{{SUBJECTPAGENAME}}/doc}}} ||&preload=Template:Documentation/preload}}}} edit]|[{{fullurl:{{{1|{{SUBJECTPAGENAME}}/doc}}}|action=history}} history]). {{#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>