Fix various (doxy) typos and whitespace issues

Found via `codespell -q 3 -L aci,ake,aline,alle,alledges,alocation,als,ang,anid,ba,beginn,behaviour,bloaded,byteorder,calculater,cancelled,cancelling,cas,cascade,centimetre,childs,colour,colours,commen,currenty,dof,doubleclick,dum,eiter,elemente,feld,freez,hist,iff,indicies,initialisation,initialise,initialised,initialises,initialisiert,ist,kilometre,lod,mantatory,methode,metres,millimetre,modell,nd,noe,normale,normaly,nto,numer,oder,orgin,orginx,orginy,ot,pard,pres,programm,que,recurrance,rougly,seperator,serie,sinc,strack,substraction,te,thist,thru,tread,uint,unter,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/Exception.h

@@ -256,7 +256,7 @@ public:
   virtual const char* what() const throw() override;
   /// Report generation
   virtual void ReportException (void) const override;
-  /// Get file name for use with tranlatable message
+  /// Get file name for use with translatable message
   std::string getFileName() const;
   /// returns a Python dictionary containing the exception data
   virtual PyObject * getPyObject(void) override;
@@ -801,4 +801,3 @@ private:
 } //namespace Base
 
 #endif // BASE_EXCEPTION_H
-

src/Base/FileInfo.h

@@ -99,9 +99,9 @@ public:
     bool isReadable () const;
     /// Checks if the file exist and is writable
     bool isWritable () const;
-    /// Tries to set the file permisson
+    /// Tries to set the file permission
     bool setPermissions (Permissions);
-    /// Checks if it is a file (not a direrctory)
+    /// Checks if it is a file (not a directory)
     bool isFile () const;
     /// Checks if it is a directory (not a file)
     bool isDir () const;
@@ -148,4 +148,3 @@ protected:
 
 
 #endif // BASE_FILEINFO_H
-