[CSL-110] added CHECK-comments to Pos.Crypto.Signing
[CSL-110] added CHECK-comments to Pos.Crypto.Signing

input-output-hk/pos-haskell-prototype,input-output-hk/pos-haskell-prototype,input-output-hk/cardano-sl,input-output-hk/cardano-sl,input-output-hk/cardano-sl,input-output-hk/cardano-sl,input-output-hk/pos-haskell-prototype