Mellin transform modification

[Chris Smith]

Could someone please check to see if the modification of the Mellin transformation at line 117 of sympy/integrals/tests/test_transforms.py  in PR #12587 is correct?

Thanks,

/c

[Kalevi Suominen]

It seems to me that the condition is correct, but the assert statement should have  (m[1], m[2])  since it will interpret commas as expression separators:

assert_stmt ::=  "assert" expression ["," expression]