[pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

Python/pywarpx/picmi.py

@@ -3253,6 +3253,7 @@ def diagnostic_initialize_inputs(self):
 
 ElectrostaticFieldDiagnostic = FieldDiagnostic
 
+
 class TimeAveragedFieldDiagnostic(FieldDiagnostic):
     """
     See `Input Parameters <https://warpx.readthedocs.io/en/latest/usage/parameters.html>`__ for more information.
@@ -3304,7 +3305,6 @@ def diagnostic_initialize_inputs(self):
         self.diagnostic.average_start_step = self.average_start_step
 
 
-
 class Checkpoint(picmistandard.base._ClassWithInit, WarpXDiagnosticBase):
     """
     Sets up checkpointing of the simulation, allowing for later restarts