Editing Template:Search link

<span class="plainlinks">[{{fullurl:Special:Search|search=<!--
    -->{{urlencode:{{{query|{{{text|{{{1|}}}}}}}}}}}<!--  Given query 
    -->{{#if:{{{limit|}}}|&limit={{{limit|}}}}}<!--
    -->{{#if:{{{ns|}}} {{{3|}}} {{{4|}}} {{{5|}}} {{{6|}}} {{{7|}}} {{{8|}}} {{{9|}}}{{{10|}}} {{{11|}}} {{{12|}}} {{{13|}}} {{{14|}}} {{{15|}}} {{{16|}}} {{{17|}}} {{{18|}}} {{{19|}}} {{{20|}}}
      |  <!-- either ns or 3-20 has a value set-->
        {{#if:{{{ns|}}}   <!-- is ns set? -->
        | {{#ifeq: {{{ns}}} | all    <!-- ns is set. Is the value "all"?
          -->| <!-- True, the value of ns is "all" -->
          &ns0=1&ns1=1&ns2=1&ns3=1&ns4=1&ns5=1&ns6=1&ns7=1&ns8=1&ns9=1<!--
          -->&ns10=1&ns11=1&ns12=1&ns13=1&ns14=1&ns15=1&ns100=1&ns101=1<!--
          -->&ns118=1&ns119=1&ns710=1&ns711=1&ns828=1&ns829=1
          | <!-- ns is set, but the value is not "all" -->
          &{{lc:{{{ns}}}}}  <!-- You saw the & added, and ns argument:
                                ns=ns5 gives &ns5=1
                                Use {{lc:}} not only to lower case,
                                but also to strip away whitespace -->
        }}
        }}{{
        #if:{{{3|}}}   <!-- positional parameter 3 = "ns0" or other nsX -->
        | &{{lc:{{{3|}}}}}=1 
        }}{{
        #if:{{{4|}}}| &{{lc:{{{4|}}}}}=1 
        }}{{
        #if:{{{5|}}}| &{{lc:{{{5|}}}}}=1 
        }}{{
        #if:{{{6|}}}| &{{lc:{{{6|}}}}}=1 
        }}{{
        #if:{{{7|}}}| &{{lc:{{{7|}}}}}=1 
        }}{{
        #if:{{{8|}}}| &{{lc:{{{8|}}}}}=1 
        }}{{
        #if:{{{9|}}}| &{{lc:{{{9|}}}}}=1 
        }}{{
        #if:{{{10|}}}| &{{lc:{{{10|}}}}}=1 
        }}{{
        #if:{{{11|}}}| &{{lc:{{{11|}}}}}=1 
        }}{{
        #if:{{{12|}}}| &{{lc:{{{12|}}}}}=1 
        }}{{
        #if:{{{13|}}}| &{{lc:{{{13|}}}}}=1 
        }}{{
        #if:{{{14|}}}| &{{lc:{{{14|}}}}}=1 
        }}{{
        #if:{{{15|}}}| &{{lc:{{{15|}}}}}=1 
        }}{{
        #if:{{{16|}}}| &{{lc:{{{16|}}}}}=1 
        }}{{
        #if:{{{17|}}}| &{{lc:{{{17|}}}}}=1 
        }}{{
        #if:{{{18|}}}| &{{lc:{{{18|}}}}}=1 
        }}{{
        #if:{{{19|}}}| &{{lc:{{{19|}}}}}=1 
        }}{{
        #if:{{{20|}}}| &{{lc:{{{20|}}}}}=1 
        }}
      |&ns0=1<!-- Neither ns nor 3-20 were set. 
        So made Template Search link's default search domain 
        equal to article space; 
        otherwise user account can set it to "all" by default
        at their own [[Special:Search]] Advanced
    -->}}&fulltext=Search<!--  does what "~" does when first character of query
    
    Done with [URL part.  
    Now for the name] part of [URL name].
    (The URL part already escapes square brackets [ ], in urlencode %5B %5D.)
  -->}}<!--

  You'll see the space.  The "replace" wrappers escape square brackets in name.
  --> {{#invoke:String|replace<!--
    -->|{{#invoke:String|replace
         |{{#if:
         {{{label|{{{link|{{{2|}}}}}}}}}<!-- If a label is given, -->
           |<nowiki />{{{label|{{{link|{{{2|}}}}}}}}}<!-- protect it from a leading * or # -->
           |<nowiki />{{{query|{{{text|{{{1|}}}}}}}}}<!-- by using <nowiki />  (Help:wikitext)
       -->}}<!--
    -->|[|&#91;}}<!-- ] with its html symbol
  -->|]|&#93;}}<!-- ] with its html symbol
  
  -->]</span><!--
Output a hidden category: -->{{#if: {{{ns|}}}{{{3|}}}{{{4|}}}{{{5|}}}{{{6|}}}{{{7|}}}{{{8|}}}{{{9|}}}{{{10|}}}{{{11|}}}{{{12|}}}{{{13|}}}{{{14|}}}{{{15|}}}{{{16|}}}{{{17|}}}{{{18|}}}{{{19|}}}{{{20|}}}
 | [[Category:Search link templates with namespace parameters]]
}}<noinclude>
{{documentation}}
<!-- Add categories to the /doc subpage, not here! -->
</noinclude>