Change error message

lib/client/doc.js

@@ -1067,7 +1067,7 @@ Doc.prototype._hardRollback = function(err) {
       if (!pendingOps.length) return;
       err = new ShareDBError(
         ERROR_CODE.ERR_PENDING_OP_REMOVED_BY_OP_SUBMIT_REJECTED,
-        'Pending op are present when doing rollback of invertible operation'
+        'Discarding pending op because of hard rollback during ERR_OP_SUBMIT_REJECTED'
       );
     }