TST: Add GitHub PR number comment on the test

Author: Licht-T

pandas/tests/sparse/test_array.py

@@ -61,6 +61,7 @@ def test_constructor_object_dtype(self):
         assert arr.dtype == np.object
         assert arr.fill_value == 'A'
 
+        # GH 17574
         data = [False, 0, 100.0, 0.0]
         arr = SparseArray(data, dtype=np.object, fill_value=False)
         assert arr.dtype == np.object