Missing textdomain causes untranslated strings

[yoancutillas]

Hello,

Can you add 'wedocs' string as third argument of esc_attr_x() function in includes/class-search-widget.php, lines 46, 46 again, and 52.

Because for an unknown reason the input placeholder 'Documentation Search …' isn't translated (in French in my case) without the textdomain.

Thanks,