* Fix various typos
Found via `codespell -q 3 -L aci,addmin,ake,aline,alle,alledges,alocation,als,ang,anid,anormal,anull,aply,apoints,ba,beginn,behaviour,bloaded,bottome,brushin,bu,byteorder,calculater,cancelled,cancelling,cas,cascade,centimetre,childrens,childs,colour,colours,commen,connexion,currenty,documentin,dof,doubleclick,dum,eiter,elemente,ende,feld,finde,findf,findn,fle,freez,graphin,groupe,hist,iff,incrementin,indexin,indicies,initialisation,initialise,initialised,initialises,initialisiert,inout,ist,itsel,kilometre,leadin,localy,lod,mantatory,matc,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,renderin,re-use,re-used,re-using,rin,ro,rougly,sectionin,seperator,sergent,serie,shs,sinc,siz,som,stpo,strack,substraction,te,technic,thist,thru,tread,tru,ue,uint,unter,uupper,uptodate,vas,vertexes,vew,wallthickness,whitespaces -S "./.git,*.po,*.ts,*.pdf,./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/SourceDoc,./tools/build/WindowsInstaller/lang,./src/Mod/TechDraw/Templates/locale"`
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* MOD: ReverseEngineering
clean code .
removed old code pcl lib is alwais >then 1.7 (ubuntu 20.04 use pcl 1.10)
* [pre-commit.ci] auto fixes from pre-commit.com hooks
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The ExternalManager class calls python functions in an external module
to create, read, update, and delete material definitions. The API
provided by the modules must conform to that defined in the
MaterialManagerExternal.py file.
All communications with the external module is routed through this
class.
