run black

Author: michaelbynum

pyomo/contrib/solver/tests/solvers/test_solvers.py

@@ -1509,11 +1509,13 @@ def test_bug_2(self, name: str, opt_class: Type[SolverBase], use_presolve: bool)
             self.assertAlmostEqual(res.incumbent_objective, -18, 5)
 
     @parameterized.expand(input=_load_tests(nl_solvers))
-    def test_presolve_with_zero_coef(self, name: str, opt_class: Type[SolverBase], use_presolve: bool):
+    def test_presolve_with_zero_coef(
+        self, name: str, opt_class: Type[SolverBase], use_presolve: bool
+    ):
         opt: SolverBase = opt_class()
         if not opt.available():
             raise unittest.SkipTest(f'Solver {opt.name} not available.')
-        
+
         """
         when c2 gets presolved out, c1 becomes 
         x - y + y = 0 which becomes

pyomo/repn/plugins/nl_writer.py

@@ -1799,7 +1799,9 @@ def _linear_presolve(self, comp_by_linear_var, lcon_by_linear_nnz, var_bounds):
                 lb, ub = var_bounds[_id]
                 if a == 0:
                     if (lb is not None and lb > b) or (ub is not None and ub < b):
-                        raise InfeasibleConstraintException(f'Model is infeasible: {lb} <= {var_map[_id]} <= {ub} and {var_map[_id]} == {a}*{var_map[x]} + {b} cannot both be satisfied')
+                        raise InfeasibleConstraintException(
+                            f'Model is infeasible: {lb} <= {var_map[_id]} <= {ub} and {var_map[_id]} == {a}*{var_map[x]} + {b} cannot both be satisfied'
+                        )
                 else:
                     x_lb, x_ub = var_bounds[x]
                     if lb is not None: