mediawiki-skins-Vector/includes/templates/SearchComponent.mustache

<div id="p-search" role="search">
	<h3 {{searchHeaderAttrs}}>
		<label for="searchInput">{{searchInputLabel}}</label>
	</h3>
	<form action="{{searchAction}}" id="searchform">
		<div id="{{searchDivID}}">
			{{{searchInputHTML}}}
			{{{titleHTML}}}
			{{!	We construct two buttons (for 'go' and 'fulltext' search modes), but only one will be
					visible and actionable at a time (they are overlaid on top of each other in CSS).
					* Browsers will use the 'fulltext' one by default (as it's the first in tree-order),
						which is desirable when they are unable to show search suggestions (either due to being
						broken or having JavaScript turned off).
					* The mediawiki.searchSuggest module, after doing tests for the broken browsers, removes
						the 'fulltext' button and handles 'fulltext' search itself; this will reveal the 'go'
						button and cause it to be used.	!}}
			{{{fallbackSearchButtonHTML}}}
			{{{searchButtonHTML}}}
		</div>
	</form>
</div>