Addressing PR fixes.

Author: MrMatthewLayton

onixlabs-corda-core-contract/src/main/kotlin/io/onixlabs/corda/core/contract/Extensions.AbstractParty.kt

@@ -34,4 +34,4 @@ val Iterable<AbstractParty>.owningKeys: Set<PublicKey>
  * @return Returns a [SecureHash] representing the participants of the initial [Iterable].
  */
 val Iterable<AbstractParty>.participantHash: SecureHash
-    get() = map { SecureHash.sha256(it.toString()) }.sortAndReduce()
+    get() = map { SecureHash.sha256(it.toString()) }.sortAndReduce()