How to change boostrap seach button class from btn-default to btn-primary?

Question

I'd like to change the class from btn-default to btn-primary like says in here: http://getbootstrap.com/css/#buttons

<!-- Standard button -->
<button type="button" class="btn btn-default">Default</button>

<!-- Provides extra visual weight and identifies the primary action in a set of buttons -->
<button type="button" class="btn btn-primary">Primary</button>

Answer 1

Copy /sites/all/themes/bootstrap/theme/bootstrap/bootstrap-search-form-wrapper.func.php

to

/sites/all/themes/my-bootstrap-subtheme/templates

and edit that file at line 14:

 $output .= '<button type="submit" class="btn btn-default">';

to:

 $output .= '<button type="submit" class="btn btn-primary">';

This might be helpful: https://drupal.org/node/225125