Changes
let's see if this also works with documented system messages, "editsection-brackets" fails on m:+mw: (and its view source docu link is broken)
<div class="template-documentation mw-content-{{dir|{{int:lang}}}}" style="margin-top:1em; clear: both; border: 2px dotted #666666; padding: 0.6em; background-color: #ECFCF4;" dir="{{dir|{{int:lang}}}}">{{#ifeq:{{{heading|}}} | false | | <div style="padding-bottom:3px; border-bottom:1px solid #aaa; margin-bottom:1ex;"><span style="font-size:150%">{{#if: {{{heading|}}} | {{{heading}}} |[[File:Template-info.png|50px|link=|alt=Documentation icon]] {{{documentation|Documentation}}} }}</span><span class="mw-editsection plainlinks" id="doc_editlinks">{{int:editsection-brackets|[{{fullurl:{{{1}}}}} {{{view|{{int:vector-view-view}}}}}]}} {{int:editsection-brackets|[{{fullurl:{{{1}}}|action=edit{{#ifexist: {{{1}}} ||&preload=Template:Documentation/preload}}}} {{{edit|{{int:vector-view-edit}}}}}]}} {{int:editsection-brackets|[{{fullurl:{{{1}}}|action=history}} {{{history|{{int:vector-view-history}}}}}]}} {{int:editsection-brackets|[{{fullurl:{{{1}}}|action=purge}} {{{purge|{{int:Code-rev-purge-link}}}}}]}}</span></div>}}
''<small>{{{text|text parameter not translated in [[Template:Documentation]]}}}</small>''