tr with d flag generates bad code if there is a replacement string

[snoopyjc]

tr with d flag generates bad code if there is a replacement string. It only generates correct code if the replacement string is empty. For example:

tr/ac/b/d;

should map a->b and delete all 'c' characters.

[snoopyjc]

Fixed in my v0.956 https://github.com/snoopyjc/pythonizer/