String Services / Format Specification Mini-Language (7.1.3.1 in 3.1)

"The precision is ignored for integer values."
in 3.0.1 and 3.1.b1 and, I presume in 2.6/7 doc

should be "A precision is not allowed for integer values."

(3.0.1)
>> format(10, '3x')
'  a'
>>> format(10, '.3x')
Traceback (most recent call last):
  File "<pyshell#2>", line 1, in <module>
    format(10, '.3x')
ValueError: Precision not allowed in integer format specifier

(I assume but cannot check that 2.6/7 behave the same.)