Fix typo

dune/fu-tutorial/referenceelementutility.hh

@@ -167,7 +167,7 @@ std::size_t size(const Dune::ReferenceElement<ctype, dim>& referenceElement, Dyn
  * This should (maybe) be a member of ReferenceElement.
  */
 template<class ctype, int dim>
-Dun::GeometryType type(const Dune::ReferenceElement<ctype, dim>& referenceElement, DynamicSubEntity subEntity)
+Dune::GeometryType type(const Dune::ReferenceElement<ctype, dim>& referenceElement, DynamicSubEntity subEntity)
 {
   return referenceElement.type(subEntity.index(), subEntity.codim());
 }