Fix various typos

Found via `codespell -q 3 -L aci,ake,aline,alle,alledges,alocation,als,ang,anid,apoints,ba,beginn,behaviour,bloaded,bottome,byteorder,calculater,cancelled,cancelling,cas,cascade,centimetre,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,kilometre,lod,mantatory,methode,metres,millimetre,modell,nd,noe,normale,normaly,nto,numer,oder,ontop,orgin,orginx,orginy,ot,pard,parms,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,./build/doc/SourceDocu`

src/Mod/Draft/draftgeoutils/wires.py

@@ -354,7 +354,7 @@ def removeInterVertices(wire):
 
 
 def cleanProjection(shape, tessellate=True, seglength=0.05):
-    """Return a compound of edges, optionally tesselate ellipses, splines
+    """Return a compound of edges, optionally tessellate ellipses, splines
     and bezcurves.
 
     The function was formerly used to workaround bugs in the projection

src/Mod/Sketcher/Gui/CommandConstraints.cpp

@@ -7137,7 +7137,7 @@ bool CmdSketcherConstrainSnellsLaw::isActive(void)
 DEF_STD_CMD_A(CmdSketcherConstrainInternalAlignment)
 
 // NOTE: This command is deprecated. Nobody seriously uses today manual creation of an internal alignment constraint
-// The only reason this code remains is the extremelly unlikely scenario that some user macro may rely on it.
+// The only reason this code remains is the extremely unlikely scenario that some user macro may rely on it.
 CmdSketcherConstrainInternalAlignment::CmdSketcherConstrainInternalAlignment()
     :Command("Sketcher_ConstrainInternalAlignment")
 {

src/Mod/Sketcher/Gui/TaskSketcherConstrains.cpp

@@ -1002,7 +1002,7 @@ void TaskSketcherConstrains::onSelectionChanged(const Gui::SelectionChanges& msg
                     if(geoid != Sketcher::Constraint::GeoUndef && pointpos == Sketcher::none){
                         // It is not possible to update on single addition/removal of a geometric element,
                         // as one removal may imply removing a constraint that should be added by a different element
-                        // that is still selected. The necessary checks outweight a full rebuild of the filter.
+                        // that is still selected. The necessary checks outweigh a full rebuild of the filter.
                         updateAssociatedConstraintsFilter();
                     }
                 }

src/Mod/Spreadsheet/App/SheetPy.xml

@@ -176,7 +176,7 @@
 recomputeCells(from, to=None)
 
 Manually recompute cells in the given range with the given order without
-following depedency order.
+following dependency order.
         </UserDocu>
       </Documentation>
     </Methode>