Improve error message on route creation

Description

Related Issue

Motivation and Context

How Has This Been Tested?

Screenshots (if appropriate):

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes.
• All new and existing tests passed.

goKMS/kms/kms.go

@@ -385,7 +385,7 @@ func (kms *KMS) AssignForwardingRoute(pId, pHop, nHop string, remoteKMS *util.Re
 	kms.routingTableMutex.Unlock()
 
 	if tmpRoute.RemoteKMS == nil {
-		log.Error("RemoteKMS in route nil")
+		log.Error("RemoteKMS in route is nil")
 		return fmt.Errorf("RemoteKMS in route is nil")
 	}