test: Make ua_comment test pass on 0.16.0
test: Make ua_comment test pass on 0.16.0

The specific length of the uacomment is one shorter on `0.16.0` than on
`0.15.99` causing the (stupid) test to fail.
Just match the latter part of the message only.

Github-Pull: #12302
Rebased-From: aac6bce11219574e097a51da867e736c3d6ad96e
Tree-SHA512: 9edecbe2529584d6d01296ec153330bb44add8445fef139d7b7a667b86fef8ee3aafea55d95ac109c9fef079133709f69798477e3eba92744ea2f6c8f5acbb7d

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