run go1.19 gofmt and make adjustments as needed

(Go 1.19 expanded doc comment syntax)

endpoint/endpoint.go

@@ -439,7 +439,7 @@ type FSMap interface { // FIXME unused
 }
 
 // NOTE: when adding members to this struct, remember
-//       to add them to `ReceiverConfig.copyIn()`
+// to add them to `ReceiverConfig.copyIn()`
 type ReceiverConfig struct {
 	JobID JobID
 

endpoint/endpoint_zfs_abstraction_replication_cursor.go

@@ -23,7 +23,7 @@ func replicationCursorBookmarkNameImpl(fs string, guid uint64, jobid string) (st
 
 var ErrV1ReplicationCursor = fmt.Errorf("bookmark name is a v1-replication cursor")
 
-//err != nil always means that the bookmark is not a valid replication bookmark
+// err != nil always means that the bookmark is not a valid replication bookmark
 //
 // Returns ErrV1ReplicationCursor as error if the bookmark is a v1 replication cursor
 func ParseReplicationCursorBookmarkName(fullname string) (uint64, JobID, error) {