Are spaces meant to be allowed in rgba color strings when making gradients?
I'm seeing different results when I run:
convert -size 400x400 'gradient:red-rgba(0, 0, 255, 0.1)' test_1.png
convert -size 400x400 'gradient:red-rgba(0,0,255,0.1)' test_2.png
Produce the two images:


which are clearly different, and one is what I'd expect, the other not so much.