Openlayers Module creates Linebreak in empty rel="" attribute of WKT-Field

After the update from 6.x-2.0-alpha10 to 6.x-2.0.beta1, the OpenLayersModule now creates a linebreak in the empty rel-attribute of the WKT-Field-Textarea, which makes the HTML invalid.

Take a look at http://gmna.de, in line 119 the OpenLayersModule produces following line:

[...]
 <textarea cols="60" rows="2" name="field_gp[openlayers_wkt]" id="edit-field-gp-openlayers-wkt"  rel="
" class="form-textarea resizable required"></textarea>
[...]

But that should be

[...]
 <textarea cols="60" rows="2" name="field_gp[openlayers_wkt]" id="edit-field-gp-openlayers-wkt" rel="" class="form-textarea resizable required"></textarea>
[...]

Checking the page against the w3-validator, this throws an error, which it didn't do with the 6.x-2.0-alpha10

Any solution to this known?

Regards Paddy