fix tutorial renames

doc/source/pre/whatsnew/0.2.rst

@@ -28,7 +28,7 @@ the same time it is able to take advantage of more than 2 GiB of RAM.
 
 New tutorial dealing with superconductivity
 -------------------------------------------
-:doc:`../../tutorial/tutorial5`
+:doc:`../../tutorial/superconductors`
 
 New `~kwant.plotter` module
 ---------------------------
@@ -71,7 +71,7 @@ Band structure functionality has been moved
 The functionality that used to be provided by the method ``energies`` of
 `kwant.system.InfiniteSystem` has been moved to the `kwant.physics` package.
 See the documentation of `kwant.physics.Bands` and
-:doc:`../../tutorial/tutorial3`.
+:doc:`../../tutorial/spectrum`.
 
 Calculation of the local density of states
 ------------------------------------------

doc/source/pre/whatsnew/1.0.rst

@@ -84,7 +84,7 @@ lattices. This often led to confusions in more convoluted use cases, so this
 behavior was changed. Now two site families created with the same parameters
 are actually indistinguishable by Kwant. If it is desired to make two site
 families which have the same geometry, but mean different things, as for
-instance in :doc:`../../tutorial/tutorial5`, then the ``name`` argument has to
+instance in :doc:`../../tutorial/superconductors`, then the ``name`` argument has to
 be used when creating a lattice, e.g. ``a = kwant.lattice.square(name='a'); b =
 kwant.lattice.square(name='b')``.