Changes
overthinking it
<code class="nowrap">{{#switch:{{{2|pair}}}
|c|close = <!--nothing-->
|s|single
|o|open
|p|pair = <{{#switch:{{{1|}}}
|categorytree=[[mw:Extension:CategoryTree|categorytree]]
|charinsert=[[mw:Extension:CharInsert|charinsert]]
|ce=[[Help:Displaying a formula#Chemistry|ce]]
|chem=[[Help:Displaying a formula#Chemistry|chem]]
|gallery=[[Help:Gallery tag|gallery]]
|graph=[[Help:Graph|graph]]
|hiero=[[mw:Extension:WikiHiero|hiero]]
|includeonly=[[Help:Template#Noinclude, includeonly, and onlyinclude|includeonly]]
|indicator=[[mw:Help:Page status indicators|indicator]]
|imagemap=[[mw:Extension:ImageMap|imagemap]]
|inputbox=[[mw:Extension:InputBox|inputbox]]
|mapframe=[[mw:Extension:Kartographer|mapframe]]
|maplink=[[mw:Extension:Kartographer#<maplink>|maplink]]
|math=[[mw:Extension:Math|math]]
|math chem=[[Help:Displaying a formula#Chemistry|math chem]]
|noinclude=[[Help:Template#Noinclude, includeonly, and onlyinclude|noinclude]]
|nowiki=[[Help:Nowiki|nowiki]]
|onlyinclude=[[Help:Template#Noinclude, includeonly, and onlyinclude|onlyinclude]]
|poem=[[mw:Extension:Poem|poem]]
|pre=[[WP:PRE|pre]]
|ref=[[mw:Extension:Cite/Cite.php|ref]]
|references=[[mw:Extension:Cite/Cite.php|references]]
|score=[[Help:Score|score]]
|section=[[mw:Extension:Labeled Section Transclusion|section]]
|source=[[mw:Extension:SyntaxHighlight|source]]
|syntaxhighlight=[[mw:Extension:SyntaxHighlight|syntaxhighlight]]
|templatedata=[[Wikipedia:TemplateData/Tutorial|templatedata]]
|templatestyles=[[mw:Extension:TemplateStyles|templatestyles]]
|timeline=[[mw:Extension:EasyTimeline|timeline]]
|#default={{{1|}}}[[Category:Pages using xtag template with unsupported tag name]]
}}{{#if:{{{params|}}}| {{{params}}}}}
}}{{#switch:{{{2|open}}}
|c|close = {{{content|}}}
|s|single =  />
|o|open = >{{{content|}}}
|p|pair = >{{{content|...}}}
}}{{#switch:{{{2|open}}}
|s|single
|o|open = <!--nothing-->
|c|close
|p|pair = </{{{1|tag}}}>
}}</code><noinclude>
{{documentation}}
</noinclude>
|c|close = <!--nothing-->
|s|single
|o|open
|p|pair = <{{#switch:{{{1|}}}
|categorytree=[[mw:Extension:CategoryTree|categorytree]]
|charinsert=[[mw:Extension:CharInsert|charinsert]]
|ce=[[Help:Displaying a formula#Chemistry|ce]]
|chem=[[Help:Displaying a formula#Chemistry|chem]]
|gallery=[[Help:Gallery tag|gallery]]
|graph=[[Help:Graph|graph]]
|hiero=[[mw:Extension:WikiHiero|hiero]]
|includeonly=[[Help:Template#Noinclude, includeonly, and onlyinclude|includeonly]]
|indicator=[[mw:Help:Page status indicators|indicator]]
|imagemap=[[mw:Extension:ImageMap|imagemap]]
|inputbox=[[mw:Extension:InputBox|inputbox]]
|mapframe=[[mw:Extension:Kartographer|mapframe]]
|maplink=[[mw:Extension:Kartographer#<maplink>|maplink]]
|math=[[mw:Extension:Math|math]]
|math chem=[[Help:Displaying a formula#Chemistry|math chem]]
|noinclude=[[Help:Template#Noinclude, includeonly, and onlyinclude|noinclude]]
|nowiki=[[Help:Nowiki|nowiki]]
|onlyinclude=[[Help:Template#Noinclude, includeonly, and onlyinclude|onlyinclude]]
|poem=[[mw:Extension:Poem|poem]]
|pre=[[WP:PRE|pre]]
|ref=[[mw:Extension:Cite/Cite.php|ref]]
|references=[[mw:Extension:Cite/Cite.php|references]]
|score=[[Help:Score|score]]
|section=[[mw:Extension:Labeled Section Transclusion|section]]
|source=[[mw:Extension:SyntaxHighlight|source]]
|syntaxhighlight=[[mw:Extension:SyntaxHighlight|syntaxhighlight]]
|templatedata=[[Wikipedia:TemplateData/Tutorial|templatedata]]
|templatestyles=[[mw:Extension:TemplateStyles|templatestyles]]
|timeline=[[mw:Extension:EasyTimeline|timeline]]
|#default={{{1|}}}[[Category:Pages using xtag template with unsupported tag name]]
}}{{#if:{{{params|}}}| {{{params}}}}}
}}{{#switch:{{{2|open}}}
|c|close = {{{content|}}}
|s|single =  />
|o|open = >{{{content|}}}
|p|pair = >{{{content|...}}}
}}{{#switch:{{{2|open}}}
|s|single
|o|open = <!--nothing-->
|c|close
|p|pair = </{{{1|tag}}}>
}}</code><noinclude>
{{documentation}}
</noinclude>