Comment 2 for bug 170401

Here's an idea: when in 'inner-stroke' mode, if the user
increases the stroke width of a shape, the inner fill could
be reduced by a corresponding amount, maintaining the
overall external dimensions.

The svg file can continue to accurately describe the shape,
what's changing is the user interface. Inkscape performs
the tedious arithmatic for the user to keep shapes aligned
when their borders change.

Could this feature request be re-opened if the above seems
possible so that it doesn't get lost? Appreciate it.