From 9ec826f79a54f826f44d7b35f92786f5e58667ca Mon Sep 17 00:00:00 2001
From: Martin Rubey <martin.rubey@tuwien.ac.at>
Date: Tue, 20 Nov 2018 10:48:16 +0100
Subject: [PATCH] fix doctests

---
 src/sage/combinat/posets/poset_examples.py |  4 +--
 src/sage/combinat/ribbon_shaped_tableau.py |  4 +--
 src/sage/combinat/skew_tableau.py          | 29 ++++++++++++----------
 src/sage/graphs/linearextensions.py        | 12 ++++-----
 4 files changed, 26 insertions(+), 23 deletions(-)

diff --git a/src/sage/combinat/posets/poset_examples.py b/src/sage/combinat/posets/poset_examples.py
index 2a0f5079552..af3dc88ed22 100644
--- a/src/sage/combinat/posets/poset_examples.py
+++ b/src/sage/combinat/posets/poset_examples.py
@@ -1398,8 +1398,8 @@ def YoungDiagramPoset(lam):
             sage: P = posets.YoungDiagramPoset(Partition([2,2])); P
             Finite meet-semilattice containing 4 elements
             sage: P.cover_relations()
-            [[(0, 0), (0, 1)], [(0, 0), (1, 0)], [(0, 1), (1, 1)], [(1, 0),
-            (1, 1)]]
+            [[(0, 0), (1, 0)], [(0, 0), (0, 1)], [(1, 0), (1, 1)],
+             [(0, 1), (1, 1)]]
         """
         def cell_leq(a, b):
             """
diff --git a/src/sage/combinat/ribbon_shaped_tableau.py b/src/sage/combinat/ribbon_shaped_tableau.py
index b48a1244aee..6a7058904f3 100644
--- a/src/sage/combinat/ribbon_shaped_tableau.py
+++ b/src/sage/combinat/ribbon_shaped_tableau.py
@@ -286,11 +286,11 @@ def __iter__(self):
              [[1, 2]],
              [[1], [2]],
              [[1, 2, 3]],
-             [[None, 2], [1, 3]],
              [[None, 1], [2, 3]],
+             [[None, 2], [1, 3]],
              [[1], [2], [3]],
              [[1, 2, 3, 4]],
-             [[None, None, 3], [1, 2, 4]]]
+             [[None, None, 1], [2, 3, 4]]]
         """
         from sage.combinat.partition import _Partitions
         for p in _Partitions:
diff --git a/src/sage/combinat/skew_tableau.py b/src/sage/combinat/skew_tableau.py
index b5e7999597e..834d0e598de 100644
--- a/src/sage/combinat/skew_tableau.py
+++ b/src/sage/combinat/skew_tableau.py
@@ -1832,9 +1832,8 @@ def __iter__(self):
             sage: [next(it) for x in range(10)]
             [[],
              [[1]],
-             [[1, 2]], [[1], [2]], [[None, 1], [2]], [[None, 2], [1]],
-             [[1, 2, 3]], [[1, 2], [3]], [[1, 3], [2]],
-             [[None, 1, 2], [3]]]
+             [[1, 2]], [[1], [2]], [[None, 2], [1]], [[None, 1], [2]],
+             [[1, 2, 3]], [[1, 2], [3]], [[1, 3], [2]], [[None, 2, 3], [1]]]
         """
         n = 0
         while True:
@@ -1893,20 +1892,24 @@ def __iter__(self):
         EXAMPLES::
 
             sage: StandardSkewTableaux(2).list()
-            [[[1, 2]], [[1], [2]], [[None, 1], [2]], [[None, 2], [1]]]
+            [[[1, 2]], [[1], [2]], [[None, 2], [1]], [[None, 1], [2]]]
 
             sage: StandardSkewTableaux(3).list()
             [[[1, 2, 3]],
              [[1, 2], [3]], [[1, 3], [2]],
-             [[None, 1, 2], [3]], [[None, 1, 3], [2]], [[None, 2, 3], [1]],
-             [[None, 1], [2, 3]], [[None, 2], [1, 3]],
-             [[None, None, 1], [2, 3]], [[None, None, 2], [1, 3]], [[None, None, 3], [1, 2]],
-             [[1], [2], [3]],
-             [[None, 1], [None, 2], [3]], [[None, 1], [None, 3], [2]], [[None, 2], [None, 3], [1]],
-             [[None, 1], [2], [3]], [[None, 2], [1], [3]], [[None, 3], [1], [2]],
-             [[None, None, 1], [None, 2], [3]], [[None, None, 1], [None, 3], [2]],
-             [[None, None, 2], [None, 1], [3]], [[None, None, 3], [None, 1], [2]],
-             [[None, None, 2], [None, 3], [1]], [[None, None, 3], [None, 2], [1]]]
+             [[None, 2, 3], [1]], [[None, 1, 2], [3]], [[None, 1, 3], [2]],
+             [[None, 2], [1, 3]], [[None, 1], [2, 3]],
+             [[None, None, 2], [1, 3]], [[None, None, 3], [1, 2]],
+             [[None, None, 1], [2, 3]],
+             [[1], [2], [3]], [[None, 2], [None, 3], [1]],
+             [[None, 1], [None, 2], [3]], [[None, 1], [None, 3], [2]],
+             [[None, 2], [1], [3]], [[None, 3], [1], [2]],
+             [[None, 1], [2], [3]], [[None, None, 3], [None, 2], [1]],
+             [[None, None, 2], [None, 3], [1]],
+             [[None, None, 1], [None, 3], [2]],
+             [[None, None, 1], [None, 2], [3]],
+             [[None, None, 2], [None, 1], [3]],
+             [[None, None, 3], [None, 1], [2]]]
         """
         for skp in SkewPartitions(self.n):
             for sst in StandardSkewTableaux_shape(skp):
diff --git a/src/sage/graphs/linearextensions.py b/src/sage/graphs/linearextensions.py
index 80416f4fbed..86e8963b6f0 100644
--- a/src/sage/graphs/linearextensions.py
+++ b/src/sage/graphs/linearextensions.py
@@ -154,12 +154,12 @@ def LinearExtensions(dag):
          [0, 2, 4, 1, 3],
          [0, 1, 2, 4, 3]]
 
-        sage: D.topological_sort_generator()
+        sage: D.topological_sort_generator().list()
         [[0, 1, 2, 3, 4],
-         [0, 1, 2, 4, 3],
          [0, 2, 1, 3, 4],
          [0, 2, 1, 4, 3],
-         [0, 2, 4, 1, 3]]
+         [0, 2, 4, 1, 3],
+         [0, 1, 2, 4, 3]]
 
         sage: D = DiGraph({ "a":["b","c"], "b":["d"], "c":["d","e"] })
         sage: Poset(D).linear_extensions().list()
@@ -169,12 +169,12 @@ def LinearExtensions(dag):
          ['a', 'c', 'e', 'b', 'd'],
          ['a', 'b', 'c', 'e', 'd']]
 
-        sage: D.topological_sort_generator()
+        sage: D.topological_sort_generator().list()
         [['a', 'b', 'c', 'd', 'e'],
-         ['a', 'b', 'c', 'e', 'd'],
          ['a', 'c', 'b', 'd', 'e'],
          ['a', 'c', 'b', 'e', 'd'],
-         ['a', 'c', 'e', 'b', 'd']]
+         ['a', 'c', 'e', 'b', 'd'],
+         ['a', 'b', 'c', 'e', 'd']]
 
     TESTS::