I'd like to add two parameters to the HTML5 "input type=search" field in general-template.php (line 237). I know the -wrong- way to do this is to edit that line directly.
I -think- the right way to do it is to create my own searchform.php file in my theme, but I'm unclear what I should put there: do I need to recreate that entire section of the general-template.php file? Basically, all I want to do is change this ...
<input type="search" class="search-field" ...>
... into this ...
<input type="search" results="5" autosave="10" class="search-field" placeholder="'
Two parameters added to one line of the input field ... so how do I pull that off?