f0e4e38844 Add newline in rustdoc (Tobin C. Harding)
Pull request description:
Docs created with the `sha256t_hash_newtype` macro are missing a newline between the doc heading and doc main section.
Note that the strings used span multiple lines and therefor the subsequent lines must be aligned with the start of the line (not indented).
Fix: #1540
ACKs for top commit:
Kixunil:
ACK f0e4e38844
apoelstra:
ACK f0e4e38844
Tree-SHA512: 240c68864da63688c400498903d5cc345bee224dcd3235df0127dcf391c66ee08c487d31fe59f890009c674574810b689d9a53628d07d8cdd46b79bc0ac3eb2b