response decode error when found sequence like &#xd

[drJabber]

Describe the bug
Sqlmap returns connection error if there's single character hex sequence in target response

To Reproduce

Expected behavior
decode response page correctly

The error is in

sqlmap/lib/request/basic.py

Line 342 in c382321

page = re.sub(b"&#x([0-9a-f]{1,2});", lambda _: decodeHex(_.group(1) if len(_.group(1)) == 2 else "0%s" % _.group(1)), page)

page = re.sub(b"&#x([0-9a-f]{1,2});", lambda _: decodeHex(_.group(1) if len(_.group(1)) == 2 else "0%s" % _.group(1)), page)
I think there should be binary format in "0%s" % _.group(1) - something like
b"0%s" % _.group(1)

[lavafroth]

b"0%s" % _.group(1) doesn't work, what about ("0%s" % _.group(1)).encode()?

[drJabber]

in python 3.8
when val = b'D' code ("0%s" % val).encode() results to b"0b'D'" (correct result should be b"0D")
but code b"0%s" % val results to correct value b"0D"

so may be appropriate code should be ("0%s" % _.group(1).decode()).encode() - it also generates correct result...