FEM: [skip ci] fix some typos

src/Mod/Fem/Gui/ViewProviderFemPostFunction.cpp

@@ -161,7 +161,7 @@ bool ViewProviderFemPostFunctionProvider::onDelete(const std::vector<std::string
 
 bool ViewProviderFemPostFunctionProvider::canDelete(App::DocumentObject* obj) const
 {
-    // deletions of objects from a FemFunction don't necesarily destroy anything
+    // deletions of objects from a FemFunction don't necessarily destroy anything
     // thus we can pass this action
     // we can warn the user if necessary in the object's ViewProvider in the onDelete() function
     Q_UNUSED(obj)