two minor bugfixes (in docs and tests)

kwant/solvers/tests/_test_sparse.py

@@ -356,7 +356,7 @@ def test_selfenergy_reflection(greens_function, smatrix):
     fsys = system.finalized()
     for sys in (fsys.precalculate(what='selfenergy'),
                 fsys.precalculate(what='all')):
-        sol = greens_function(fsys, 0, (), [0], [0])
+        sol = greens_function(sys, 0, (), [0], [0])
         assert_almost_equal(sol.transmission(0,0), t.transmission(0,0))
     assert_raises(ValueError, greens_function, fsys.precalculate(what='modes'),
                   0, (), [0], [0])

kwant/system.py

@@ -73,7 +73,7 @@ class FiniteSystem(System):
     For lead ``n``, the method leads[n].selfenergy must return a square matrix
     whose size is ``sum(len(self.hamiltonian(site, site)) for site in
     self.lead_interfaces[n])``. The output of ``leads[n].modes`` has to be a
-    tuple of `~kwant.physics.PropatatingModes, ~kwant.physics.StabilizedModes`.
+    tuple of `~kwant.physics.PropagatingModes, ~kwant.physics.StabilizedModes`.
 
     Often, the elements of `leads` will be instances of `InfiniteSystem`.  If
     this is the case for lead ``n``, the sites ``lead_interfaces[n]`` match