"image.url" should output the complete asset url instead only the name of the asset

Perhaps this is a bug or is intentional for some reason.

When I try to get only the asset url `#{myimage.url}`, the output I get is only the name of the file. But instead, I wanted the complete asset url, so the image doe not get broken. To fix that, I used the `image_path()` when calling the image url.
