diff --git a/rdflib/plugins/parsers/trig.py b/rdflib/plugins/parsers/trig.py
index 460c712e1..770265df8 100644
--- a/rdflib/plugins/parsers/trig.py
+++ b/rdflib/plugins/parsers/trig.py
@@ -105,8 +105,7 @@ def graph(self, argstr: str, i: int) -> int:
         # type error: Incompatible types in assignment (expression has type "Graph", variable has type "Optional[Formula]")
         self._context = self._store.newGraph(graph)  # type: ignore[assignment]
         if self._context is not None and self._parentContext is not None:
-            raise SyntaxError("GRAPH may not include a GRAPH "
-                              "(#trig-graph-bad-07)")
+            raise SyntaxError("GRAPH may not include a GRAPH " "(#trig-graph-bad-07)")
 
         while 1:
             i = self.skipSpace(argstr, j)