Input "0.0" for pretty

[mmoult]

Incorrect parsing / processing (not sure which!) for some representations of zero:

• "0" = correct
• "0." = correct
• "0.0" = incorrectly handled like 1.0
• "0.00" = incorrectly handled like 1.0
• "0.01" = correct
• "1.0" = correct
• "1.00" = correct