Typo within Responsive Image module

There is a small documentation typo within function template_preprocess_responsive_image() :

This:

    // There is only one source tag with an empty media attribute. This means
    // we can output an image tag with the srcset attribute in stead of a
    // picture tag.

Should be:

    // There is only one source tag with an empty media attribute. This means
    // we can output an image tag with the srcset attribute instead of a
    // picture tag.

Patch coming shortly.