d9ccb60a2f Fix typo in hash tag type (Tobin C. Harding)
Pull request description:
In commit: `39f7dcb Reduce API surface of tagged wrapped hash types` I introduced a typo in the tagged hash tag type. Fortunately it has no effect because the tag type controls how an engine is created (when the tag is input into the engine) and has no effect on the call to `from_engine`. However the typo makes the code confusing.
This bug is currently unreleased.
Fix: #3649
ACKs for top commit:
apoelstra:
ACK d9ccb60a2f9e89c8bb1979f032e8a222ab9b025a; successfully ran local tests
Tree-SHA512: 54cc78fb74ea119beaf4500d49a4d3954ffc3c52494b3ebc1539a3eec35078cb9388e72b42c59f371b53cced89b7b6303a0e3d3b02e59d72da182dd7bbfe2a55