[squeak-dev] printShowingDecimalPlaces: is broken in 3.10

Execute the following in a workspace to reproduce the bug.

  1.009 printShowingDecimalPlaces: 3 '1.900'

It looks like a performance improvement went wrong. I've created
Mantis entry 7028 for this which includes a fix along with some SUnit
tests.

I've set it to severity minor, but it's a showstopper if you depend
on that functionality. The fix was trivial though.

Bryce