Rename Error::HashFromPrivatePoint to Error::IllegalHashFromPrivatePoint #533

Job	Run time
Book tests	2m 38s
Bitrot check	1m 46s
Build target wasm32-unknown-unknown	2m 55s
Build target wasm32-wasi	2m 54s
Code coverage	3h 0m 8s
Intra-doc links	2m 37s
Rustfmt	13s
Test on ubuntu-latest	11m 54s
Test on i686-unknown-linux-gnu	22m 46s
Test on i686-unknown-linux-gnu with beta features	23m 38s
Test on windows-latest	15m 2s
Test on i686-unknown-linux-gnu with nightly features	24m 23s
Test on macOS-latest	9m 26s
Test on ubuntu-latest with beta features	11m 31s
Test on windows-latest with beta features	15m 27s
Test on macOS-latest with beta features	9m 0s
Test on ubuntu-latest with nightly features	12m 1s
Test on windows-latest with nightly features	15m 48s
Test on macOS-latest with nightly features	11m 18s
	6h 15m 25s

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