{image: image.png}
{image: "image with spaces.png"}

{image: image.png scale=.2     }
{image: "image with spaces.png"    scale=.20}
{image:        image.png scale=1.2}

{image: image.png size=2cmx}
{image: "image with spaces.png" size=x2cm}
{image: image.png size=2cmx1cm}

{image: image.png size=2emx}
{image: "image with spaces.png" size=x2em}
{image: image.png size=2emx1em}

{image: image.png size=50ptx}
{image: "image with spaces.png" size=x50pt}
{image: image.png size=50ptx100pt}

{image: image.png size=2.5cmx}
{image: "image with spaces.png" size=x2.5cm}
{image: image.png size=2.5cmx1.5cm}

{image: image.png size=3cmx10pt}
{image: "image with spaces.png" size=10ptx3cm}
{image: image.png size=x}

{image: image.png error=foo}
{image: "image with spaces.png" not_a_size}
{image: "image with spaces.png" too many arguments}
{image: image.png size=2exx3km}
{image: }