LGTM: various fixes for using string operator instead of numeric

src/Mod/Path/PathScripts/PathAdaptive.py

@@ -422,7 +422,7 @@ def Execute(op,obj):
 
         start = time.time()
 
-        if inputStateChanged or adaptiveResults == None:
+        if inputStateChanged or adaptiveResults is None:
             a2d = area.Adaptive2d()
             a2d.stepOverFactor = 0.01*obj.StepOver
             a2d.toolDiameter = float(op.tool.Diameter)

src/Mod/Path/PathScripts/PathSimulatorGui.py

@@ -486,7 +486,7 @@ class PathSimulation:
     def InvalidOperation(self):
         if len(self.activeOps) == 0:
           return True
-        if (self.tool == None):
+        if (self.tool is None):
           TSError("No tool assigned for the operation")
           return True
         return False