anchor.diff:                  padding: new EdgeInsets.only(top: appBarHeight),
                   child: new Stack(
                     children: <Widget>[
  -                    new Padding(
  -                      padding: new EdgeInsets.only(top: fabHalfSize),
  -                      child: new SizedBox(
  -                        width: fullWidth ? null : _kRecipePageMaxWidth,
  -                        child: new RecipeSheet(recipe: config.recipe)
  -                      )
  +                    new Container(
  +                      padding: new EdgeInsets.only(top: _kFabHalfSize),
  +                      width: fullWidth ? null : _kRecipePageMaxWidth,
  +                      child: new RecipeSheet(recipe: config.recipe),
                       ),
                       new Positioned(
                         right: 16.0,
                         child: new FloatingActionButton(
                           child: new Icon(isFavorite ? Icons.favorite : Icons.favorite_border),
  -                        onPressed: _toggleFavorite
  -                      )
  -                    )
  -                  ]
  -                )
  -              )
  -            )
  -          )
  -        )
  -      ]
  +                        onPressed: _toggleFavorite,
  +                      ),
  +                    ),
  +                  ],
  +                ),
  +              ),
  +            ),
  +          ),
  +        ),
  +      ],
       );
     }
   
  
positive.code:           recipe: recipe,
            onTap: () { showRecipePage(context, recipe); }
          );
        })
      );
    }
  
    void showFavoritesPage(BuildContext context) {
      Navigator.push(context, new MaterialPageRoute<Null>(
        settings: const RouteSettings(name: "/pesto/favorites"),
        builder: (BuildContext context) => new PestoFavorites()
      ));
    }
  
  
negative.code: final ThemeData _kTheme = new ThemeData(
    brightness: Brightness.light,
    primarySwatch: Colors.teal,
    accentColor: Colors.redAccent[200],
  );
  
  class PestoHome extends StatelessWidget {
  