import textwrap

def print_s(legend, s):
    print(legend.rjust(14), repr(s))

def wrap(s):
    return textwrap.fill(s, width=30)

# original is 31 characters long:
#           0        1         2         3
#           1234567890123456789012345678901
original = "xxxx xxxx xxxx xxxx xxxx.  xxxx"
print_s("original:", original)

wrapped = wrap(original)
print_s("wrapped:", wrapped)

wrapped2 = wrap(wrapped)
print_s("wrapped twice:", wrapped2)

print()

# this fails!
assert wrapped == wrapped2