lint fixes

gusto/solvers/linear_solvers.py

@@ -57,10 +57,11 @@ def __init__(self, equations, alpha=0.5, tau_u=0.5, tau_r=0.5, tau_t=0.5,
         self.equations = equations
         self.dt = equations.domain.dt
         self.alpha = alpha
+
         # Set relaxation parameters.
-        self.tau_u=tau_u
-        self.tau_t=tau_t
-        self.tau_r=tau_r
+        self.tau_u = tau_u
+        self.tau_t = tau_t
+        self.tau_r = tau_r
 
         if solver_parameters is not None:
             if not overwrite_solver_parameters:
@@ -145,7 +146,7 @@ class CompressibleSolver(TimesteppingSolver):
                                                            'pc_type': 'bjacobi',
                                                            'sub_pc_type': 'ilu'}}}
 
-    def __init__(self, equations, alpha=0.5, tau_u = 0.5, tau_r = 0.5, tau_t = 0.5,
+    def __init__(self, equations, alpha=0.5, tau_u=0.5, tau_r=0.5, tau_t=0.5,
                  quadrature_degree=None, solver_parameters=None,
                  overwrite_solver_parameters=False):
         """

gusto/timestepping/semi_implicit_quasi_newton.py

@@ -485,14 +485,14 @@ def apply(self, x_in, x_nl, x_out, label):
 
         x_out.assign(x_in(self.field_name))
         x_out += self.xF
-    
+
     def zero_forcing_terms(self, equation, x_in, x_out, transported_field_names):
         """
         Zero forcing term F(x) for non-wind transport.
 
         This takes x_in and x_out, where                                      \n
         x_out = x_in + scale*F(x_nl)                                          \n
-        for some field x_nl and sets x_out = x_in for all non-wind transport terms 
+        for some field x_nl and sets x_out = x_in for all non-wind transport terms
 
         Args:
             equation (:class:`PrognosticEquationSet`): the prognostic