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Rather than replace each unprintable byte with a '?' character, replace it with a hex escape instead. The API now allocates a copy rather than modifying the input in place. Author: Jacob Champion <jchampion@timescale.com> Discussion: https://www.postgresql.org/message-id/CAAWbhmgsvHrH9wLU2kYc3pOi1KSenHSLAHBbCVmmddW6-mc_=w@mail.gmail.com