Fix typos and whitespace

Found via `codespell -q 3 -L aci,ake,aline,alle,alledges,alocation,als,ang,anid,anormal,apoints,ba,beginn,behaviour,bloaded,bottome,byteorder,calculater,cancelled,cancelling,cas,cascade,centimetre,childrens,childs,colour,colours,commen,connexion,currenty,dof,doubleclick,dum,eiter,elemente,ende,feld,finde,findf,freez,hist,iff,indicies,initialisation,initialise,initialised,initialises,initialisiert,inout,ist,itsel,kilometre,lod,mantatory,methode,metres,millimetre,modell,nd,noe,normale,normaly,nto,numer,oce,oder,ontop,orgin,orginx,orginy,ot,pard,parm,parms,pres,programm,que,rady,recurrance,ro,rougly,seperator,serie,sinc,siz,strack,substraction,te,technic,thist,thru,tread,uint,unter,uptodate,vertexes,wallthickness,whitespaces -S ./.git,*.po,*.ts,./ChangeLog.txt,./src/3rdParty,./src/Mod/Assembly/App/opendcm,./src/CXX,./src/zipios++,./src/Base/swig*,./src/Mod/Robot/App/kdl_cp,./src/Mod/Import/App/SCL,./src/WindowsInstaller,./src/Doc/FreeCAD.uml,./src/Base/StackWalker.cpp,./build/doc/SourceDocu`

src/Mod/Path/PathScripts/PathEngrave.py

@@ -51,7 +51,7 @@ class ObjectEngrave(PathEngraveBase.ObjectOp):
         self.wires = []
 
     def opFeatures(self, obj):
-        """opFeatures(obj) ... return all standard features and edges based geomtries"""
+        """opFeatures(obj) ... return all standard features and edges based geometries"""
         return (
             PathOp.FeatureTool
             | PathOp.FeatureDepths

src/Mod/Path/PathScripts/PathPost.py

@@ -115,7 +115,7 @@ def processFileNameSubstitutions(
         j = job.Label
         filename = filename.replace("%j", j)
 
-    # Use the sequnce number if explicitly called
+    # Use the sequence number if explicitly called
     if "%S" in filename:
         j = job.Label
         filename = filename.replace("%S", str(sequencenumber))