Fix typo in error message.

Daniele Varrazzo

Discussion: https://www.postgresql.org/message-id/CA+mi_8bqY5THP8hLKKSdMEr5GCz6M=hD6_uLbvFeyEBfwqUxeA@mail.gmail.com

src/backend/replication/libpqwalreceiver/libpqwalreceiver.c

@@ -806,11 +806,10 @@ libpqrcv_processTuples(PGresult *pgres, WalRcvExecResult *walres,
 	/* Make sure we got expected number of fields. */
 	if (nfields != nRetTypes)
 		ereport(ERROR,
-				(errmsg("invalid query responser"),
+				(errmsg("invalid query response"),
 				 errdetail("Expected %d fields, got %d fields.",
 						   nRetTypes, nfields)));
 
-
 	walres->tuplestore = tuplestore_begin_heap(true, false, work_mem);
 
 	/* Create tuple descriptor corresponding to expected result. */