You don't need these gymnastics of knowing ASCII in Python quines: a = '''a = {}...

You don't need these gymnastics of knowing ASCII in Python quines:

    a = '''a = {}
    print(a.format(repr(a)))'''
    print(a.format(repr(a)))

(OK, it's not a quine yet, because the output has slightly different formatting. But the formatting very quickly reaches a fixed point, if you keep feeding it into a Python interpreter.)

The actual quine is the slightly less readable:

    a = 'a = {}\nprint(a.format(repr(a)))'
    print(a.format(repr(a)))

https://github.com/matthiasgoergens/Quine/blob/c53f187a4b403... has a C quine that doesn't rely on ASCII values either.