Fix %c string and bytes interpolation

[97littleleaf11]

Description

According to PEP461, conversion type %c performs differently for string and bytes. In addition, b'%c’ % str is not supported in Python3.

Test Plan

CPython Python3:

ss = 'a'
bb = b'a'
ii = 97
ff = 97.0

print('%c' % ss)
# print('%c' % '') # TypeError: %c requires int or char
# print('%c' % 'aa') # TypeError: %c requires int or char
# print('%c' % bb) # TypeError: %c requires int or char
print('%c' % ii)
# print('%c' % ff) # TypeError: %c requires int or char

# print(b'%c' % ss) # TypeError: %c requires an integer in range(256) or a single byte
# print(b'%c' % '') # TypeError: %c requires an integer in range(256) or a single byte
# print(b'%c' % 'aa') # TypeError: %c requires an integer in range(256) or a single byte
print(b'%c' % bb)
print(b'%c' % ii)
# print(b'%c' % ff) # TypeError: %c requires an integer in range(256) or a single byte

CPython Python2:

print('%c' % ss)
# print('%c' % '') # TypeError: %c requires int or char
# print('%c' % 'aa') # TypeError: %c requires int or char
print('%c' % bb)
print('%c' % ii)
# print('%c' % ff) # TypeError: integer argument expected, got float

print(b'%c' % ss)
# print('%c' % '') # TypeError: %c requires int or char
# print('%c' % 'aa') # TypeError: %c requires int or char
print(b'%c' % bb)
print(b'%c' % ii)
# print(b'%c' % ff) # TypeError: integer argument expected, got float