0dd0ffb61dRevert "Allow whitespace in netpbm sizes"
Introduced a major regression.
f9bee1b87dCherry-pick various fixes after the 5.43 release
* Adjust degas to co-exist with Adobe Photoshop Color (Joerg Jenderek)
* Handle negative numbers in overflow calculation
* Comment out DEGAS entries because they get mixed with python pickle files
* For indirect magic, reset printed_something and need_separator so that (...)
* Maintain firstline correctly