Fix typos [skip ci]

Found via `codespell v2.1.dev0`

src/Mod/Arch/importWebGL.py

@@ -670,7 +670,7 @@ def export( exportList, filename, colors = None, camera = None ):
                                 break
                         if not found: break
                     if not found:
-                        FreeCAD.Console.PrintMessage("Facet to Face Mismach.\n")
+                        FreeCAD.Console.PrintMessage("Facet to Face Mismatch.\n")
                         objdata['facesToFacets'] = []
                         break
                     
@@ -685,7 +685,7 @@ def export( exportList, filename, colors = None, camera = None ):
                                 break
                         if not found: break
                     if not found:
-                        FreeCAD.Console.PrintMessage("Facet List Mismach.\n")
+                        FreeCAD.Console.PrintMessage("Facet List Mismatch.\n")
                         objdata['facesToFacets'] = []
                         break
                     

src/Mod/Draft/draftguitools/gui_draft2sketch.py

@@ -24,7 +24,7 @@
 # ***************************************************************************
 """Provides GUI tools to convert Draft objects to Sketches and back.
 
-Many Draft objects will be converted to a single non-contrainted Sketch.
+Many Draft objects will be converted to a single non-constrained Sketch.
 
 However, a single sketch with disconnected traces will be converted
 into several individual Draft objects.

src/Mod/Path/PathScripts/PathSlot.py

@@ -792,7 +792,7 @@ class ObjectSlot(PathOp.ObjectOp):
         flag = 1
         eCnt = len(shape.Edges)
         lstE = eCnt - 1
-        for i in range(0, eCnt):  # populate empty parrallel edge flag list
+        for i in range(0, eCnt):  # populate empty parallel edge flag list
             parallel_edge_flags.append(0)        
         for i in range(0, eCnt):  # Cycle through edges to identify parallel pairs
             if i < lstE:
@@ -1075,7 +1075,7 @@ class ObjectSlot(PathOp.ObjectOp):
 
     def _normalizeVector(self, v):
         """_normalizeVector(v)...
-        Returns a copy of the vector recieved with values rounded to 10 decimal places."""
+        Returns a copy of the vector received with values rounded to 10 decimal places."""
         posTol = 0.0000000001
         negTol = -1 * posTol
         V = FreeCAD.Vector(v.x, v.y, v.z)
@@ -1220,7 +1220,7 @@ class ObjectSlot(PathOp.ObjectOp):
     def _extendArcSlot(self, p1, p2, cent, begExt, endExt):
         """_extendArcSlot(p1, p2, cent, begExt, endExt)...
         This function extends an arc defined by two end points, p1 and p2, and the center.
-        The arc is extended along the circumferance with begExt and endExt values.
+        The arc is extended along the circumference with begExt and endExt values.
         The function returns the new end points as tuple (n1, n2) to replace p1 and p2."""
         cancel = True
         n1 = p1

src/Mod/Path/PathScripts/post/heidenhain_post.py

@@ -490,8 +490,8 @@ def HEIDEN_End(ActualJob): #use Label for program name
         program_id = "NEW"
     return "END PGM " + program_id + " " + UNITS
 
-#def HEIDEN_ToolDef(tool_id, tool_lenght, tool_radius): # old machines don't have tool table, need tooldef list
-#    return "TOOL DEF  " + tool_id + " R" + "{:.3f}".format(tool_lenght) + " L" + "{:.3f}".format(tool_radius)
+#def HEIDEN_ToolDef(tool_id, tool_length, tool_radius): # old machines don't have tool table, need tooldef list
+#    return "TOOL DEF  " + tool_id + " R" + "{:.3f}".format(tool_length) + " L" + "{:.3f}".format(tool_radius)
 
 def HEIDEN_ToolCall(tool_Params):
     global MACHINE_SPINDLE_DIRECTION

src/Mod/Sketcher/App/SketchObject.cpp

@@ -2347,7 +2347,7 @@ int SketchObject::trim(int GeoId, const Base::Vector3d& point)
             }
             constrId++;
         }
-        /* It is possible that the trimming entity has both a PointOnObject constrait to the trimmed entity, and a simple Tangent contstrait
+        /* It is possible that the trimming entity has both a PointOnObject constraint to the trimmed entity, and a simple Tangent contstrait
          * to the trimmed entity. In this case we want to change to a single end-to-end tangency, i.e we want to ensure that constrType1 is
          * set to Sketcher::Tangent, that the secondPos1 is captured from the PointOnObject, and also make sure that the PointOnObject constraint
          * is deleted. The below loop ensures this, also in case the ordering of the constraints is first Tangent and then PointOnObject. */
@@ -2808,7 +2808,7 @@ int SketchObject::trim(int GeoId, const Base::Vector3d& point)
         }
         if (GeoId1 >= 0) {
             creategeometryundopoint(); // for when geometry will change, but no new geometry will be committed.
-            ConstraintType constrType1 = Sketcher::PointOnObject; // So this is the fallback contraint type here.
+            ConstraintType constrType1 = Sketcher::PointOnObject; // So this is the fallback constraint type here.
             PointPos secondPos1 = Sketcher::none;
 
             getTransformParamsAndDeleteConstraints(GeoId, GeoId1, point1, constrType1, secondPos1);