The "width" parameter to a BasicStroke is used in multiple constructors, and
is a property that can be get/set. It's data type is "float", and it is
described to be the "pen width".

This much makes sense and is fairly straightforward. HOWEVER, when it comes
down to the brass tacks of actually using this, it is incredibly confusing
what it specifically means.

For example, the questions in my mind that there are no answers for include:

- What is the valid range for this parameter? [0..1) ?? [1..inf) ??
   Can it have a negative value?

- What is the effect of a '0' value? (I notice one bug complaining that
   a width=0 doesn't draw a 1 pixel wide line)

- Why is it's type "float". I expect that the width parameter refers to
  the number of pixels wide the pen is. But pixels cannot have fractional
  size (that is, it doesn't make sense for a pen to be 1.5 pixels wide since
  pixels cannot be split in half). Under this expectation I'd also expect
  the width parameter to have type "int" instead of "float".

- The description in the getLineWidth method ("Line width is represented
   in user space.") doesn't make much sense.

Of these the notes about "width" parameter is the most important to resolve.
I understand that "user space" is a commonly used term in graphics rendering,
but the phrase doesn't make enough sense in context to me to understand
what it means.