FEM: Python pep8 code formatting

src/Mod/Fem/femsolver/elmer/equations/flow.py

@@ -34,6 +34,7 @@ from ... import equationbase
 
 CONVECTION_TYPE = ["None", "Computed", "Constant"]
 
+
 def create(doc, name="Flow"):
     return femutils.createObject(
         doc, name, Proxy, ViewProxy)

src/Mod/Fem/femsolver/elmer/equations/heat.py

@@ -35,6 +35,7 @@ from ... import equationbase
 CONVECTION_TYPE = ["None", "Computed", "Constant"]
 PHASE_CHANGE_MODEL = ["None", "Spatial 1", "Spatial 2", "Temporal"]
 
+
 def create(doc, name="Heat"):
     return femutils.createObject(
         doc, name, Proxy, ViewProxy)
@@ -67,7 +68,7 @@ class Proxy(nonlinear.Proxy, equationbase.HeatProxy):
             "Equation",
             "Model for phase change"
         )
-        
+
         obj.Bubbles = True
         obj.Stabilize = False
         obj.Convection = CONVECTION_TYPE

src/Mod/Fem/femsolver/elmer/writer.py

@@ -1348,8 +1348,10 @@ class Writer(object):
         if self._hasExpression(equation) != equation.NonlinearTolerance:
             equation.setExpression("NonlinearTolerance", str(equation.NonlinearTolerance))
         if self._hasExpression(equation) != equation.NonlinearNewtonAfterTolerance:
-            equation.setExpression("NonlinearNewtonAfterTolerance",\
-                str(equation.NonlinearNewtonAfterTolerance))
+            equation.setExpression(
+                "NonlinearNewtonAfterTolerance",
+                str(equation.NonlinearNewtonAfterTolerance)
+            )
 
     def _createNonlinearSolver(self, equation):
         # first check if we have to update