FEM: code formating, typos in comments

some aren't really typos but are more cosmetic.

src/Mod/Fem/FemInputWriterCcx.py

@@ -874,7 +874,7 @@ class FemInputWriterCcx(FemInputWriter.FemInputWriter):
             f.write('\n')
         # grav (erdbeschleunigung) is equal for all elements
         # should be only one constraint
-        # different elment sets for different density are written in the material element sets already
+        # different element sets for different density are written in the material element sets already
 
     def write_constraints_force(self, f):
         # check shape type of reference shape and get node loads

src/Mod/Fem/FemMeshTools.py

@@ -764,7 +764,7 @@ def build_mesh_faces_of_volume_elements(face_table, femelement_table):
         for n in face_table[veID]:
             index = femelement_table[veID].index(n)
             # print(index)
-            face_nodenumber_table[veID].append(index + 1)  # lokale node number = index + 1
+            face_nodenumber_table[veID].append(index + 1)  # local node number = index + 1
         # print('VolElement:', veID)
         # print('  --> ', femelement_table[veID])
         # print('  --> ', face_table[veID])
@@ -1111,7 +1111,7 @@ def get_reference_group_elements(obj, aPart):
                     FreeCAD.Console.PrintError('This should not happen, please debug!\n')
                     # in this case we would not have needed to use the is_same_geometry() inside find_element_in_shape()
                     # AFAIK we could have used the Part methods isPartner() or even isSame()
-                    # We're gonna find out when we need to debug this :-)!
+                    # We're going to find out when we need to debug this :-)!
     return (key, sorted(elements))
 
 

src/Mod/Fem/TestFem.py

@@ -385,7 +385,7 @@ class FemTest(unittest.TestCase):
         self.assertEqual(len(analysis.Group), get_defmake_count() - 1)  # because of the analysis itself count -1
 
     def test_pyimport_all_FEM_modules(self):
-        # we're gonna try to import all python modules from FreeCAD Fem
+        # we're going to try to import all python modules from FreeCAD Fem
         pymodules = []
 
         # collect all Python modules in Fem