The Queen’s stylesheets
Not very many substitutions performed[1]:    'colour'       => 'color',
    'grey'         => 'gray',
    '!please'      => '!important',
    'transparency' => 'opacity',
    'centre'       => 'center',
    'plump'        => 'bold',
    'photograph'   => 'image',
    'capitalise'   => 'capitalize'

Would've thought there'd be a ton of opportunities to pedantically correct CSS's choice of words. !please instead of !important made me laugh, though.[1]: Taken from https://github.com/idiot/Spiffing/blob/master/spiffing.php (aside, please don't use this project as a good example of PHP code style).