Currently %c formatting raises OverflowError if an argument is out of range.
>>> '%c' % 1114112
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
OverflowError: %c arg not in range(0x110000)
>>> '{:c}'.format(1114112)
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
OverflowError: %c arg not in range(0x110000)
The same for PyUnicode_Format(), PyUnicode_FromFromat() and
PyUnicode_FromFromatV() in C API.
But chr() raises ValueError.
>>> chr(1114112)
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
ValueError: chr() arg not in range(0x110000)
And ValueError looks more suitable, because it is not really an overflow
(limitation of the C language, or a C type). Can we change an exception
type for %c formatting from OverflowError to ValueError?
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