message: Add documentation to GetSharedFaceTransformations.
diff: @@ -391,14 +391,21 @@ public:
  int FaceNo,
  int mask = 31) override;
  - /** Get the FaceElementTransformations for the given shared face (edge 2D).
  + /** Get the FaceElementTransformations for the given shared face (edge 2D)
  + using the shared face index @a sf. @a fill2 specify if the information
  + for elem2 of the face should be computed or not.
  In the returned object, 1 and 2 refer to the local and the neighbor
  elements, respectively. */
  FaceElementTransformations *
  GetSharedFaceTransformations(int sf, bool fill2 = true);
  + /** Get the FaceElementTransformations for the given shared face (edge 2D)
  + using the face index @a FaceNo. @a fill2 specify if the information
  + for elem2 of the face should be computed or not.
  + In the returned object, 1 and 2 refer to the local and the neighbor
  + elements, respectively. */
  FaceElementTransformations *
  - GetSharedFaceTransformationsByLocalIndex(int FaceNo, bool fill2);
  + GetSharedFaceTransformationsByLocalIndex(int FaceNo, bool fill2 = true);
  ElementTransformation *
  GetFaceNbrElementTransformation(int i)
  