Even if it is a standard, it is not enforced and I find it too short sometimes.
I know that can specify a longer description.
''.join(map(str, range(10))) * 6
012345678901234567890123456789012345678901234567890123456789
seems to lead to a different behavior.
import string
string.ascii_lowercase + string.ascii_lowercase
abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyz
+2