tame the potential output size of the test

Author: dimpase

src/sage/combinat/bijectionist.py

@@ -159,8 +159,8 @@
     sage: bij.set_statistics((lambda a: a.size(), lambda b: b.node_number()-1))
     sage: from sage.combinat.cyclic_sieving_phenomenon import orbit_decomposition
     sage: bij.set_constant_blocks(orbit_decomposition(A, theta))
-    sage: list(bij.solutions_iterator())
-    []
+    sage: len(list(bij.solutions_iterator()))
+    0
 
 Next we demonstrate how to search for a bijection.  To do so, we identify `s`
 and `S`::