Misc. typo and whitespace fixes

ref: https://forum.freecadweb.org/viewtopic.php?f=3&t=30988#p256964
along with other misc. fixes

src/Mod/Path/PathScripts/PathDressupLeadInOut.py

@@ -185,7 +185,7 @@ class ObjectDressup:
         return results
 
     def getLeadEnd(self, obj, queue, action):
-        '''returns the  Gcode of LeadOut.'''
+        '''returns the Gcode of LeadOut.'''
         global currLocation
         results = []
         horizFeed = PathDressup.toolController(obj.Base).HorizFeed.Value

src/Mod/Path/PathScripts/PathSurface.py

@@ -311,7 +311,7 @@ class ObjectSurface(PathOp.ObjectOp):
         return True
 
     def opSetDefaultValues(self, obj, job):
-        '''opSetDefaultValues(obj, job) ... initialize defauts'''
+        '''opSetDefaultValues(obj, job) ... initialize defaults'''
 
         # obj.ZigZagAngle = 45.0
         obj.StepOver = 50