style: pre-commit fixes

pybop/problems/design_problem.py

@@ -53,7 +53,7 @@ def __init__(
             else:
                 initial_state = {"Initial SoC": 1.0}  # default value
         elif "Initial open-circuit voltage [V]" in initial_state.keys():
-             warnings.warn(
+            warnings.warn(
                 "It is usually better to define an initial state of charge as the "
                 "initial_state for a DesignProblem because this state will scale with "
                 "design properties such as the capacity of the battery, as opposed to the "

pybop/problems/fitting_problem.py

@@ -45,13 +45,13 @@ def __init__(
         additional_variables = list(set(additional_variables))
 
         if initial_state is not None and "Initial SoC" in initial_state.keys():
-             warnings.warn(
+            warnings.warn(
                 "It is usually better to define an initial open-circuit voltage as the "
                 "initial_state for a FittingProblem because this value can typically be "
                 "obtained from the data, unlike the intrinsic initial state of charge. "
                 "In the case where the fitting parameters do not change the OCV-SOC "
                 "relationship, the initial state of charge may be passed to the model "
-                "using, for example, `model.set_initial_state({\"Initial SoC\": 1.0})` "
+                'using, for example, `model.set_initial_state({"Initial SoC": 1.0})` '
                 "before constructing the FittingProblem.",
                 UserWarning,
             )

tests/unit/test_problem.py

@@ -116,7 +116,9 @@ def test_fitting_problem(self, parameters, dataset, model, signal):
                 signal=signal,
                 initial_state={"Initial SoC": 0.8},
             )
-        assert "It is usually better to define an initial open-circuit voltage" in str(record[0].message)
+        assert "It is usually better to define an initial open-circuit voltage" in str(
+            record[0].message
+        )
 
         # Construct Problem
         problem = pybop.FittingProblem(
@@ -189,7 +191,9 @@ def test_design_problem(self, parameters, experiment, model):
                 experiment,
                 initial_state={"Initial open-circuit voltage [V]": 4.0},
             )
-        assert "It is usually better to define an initial state of charge" in str(record[0].message)
+        assert "It is usually better to define an initial state of charge" in str(
+            record[0].message
+        )
 
         # Construct Problem
         problem = pybop.DesignProblem(model, parameters, experiment)