For embedded
<svg>
elements,
the SVGWIDTH= option specifies the width of the rectangular region
into which the
<svg>
element is placed.
The SVG output is scaled to fit the viewBox if SVGWIDTH="100%".
If the SVGWIDTH= option
is not specified, the width attribute on the
<svg>
element
is not set, which effectively provides full scalability by using a
width of 100%.
The value for the SVGWIDTH=
option can be specified without delimiters, enclosed in single or
double quotation marks, or enclosed in parentheses.