Fix broken hyperlinks.

Author: drvinceknight

docs/tutorials/further_topics/probabilistict_end_tournaments.rst

@@ -12,7 +12,7 @@ probability::
 
 
 We can view the results in a similar way as for described in
-:ref:`payoff-matrix`::
+:ref:`tournament-results`::
 
     >>> results = tournament.play()
     >>> m = results.payoff_matrix

docs/tutorials/getting_started/visualising_results.rst

@@ -43,9 +43,9 @@ We can view the distributions of wins for each strategy::
 Visualising the payoff matrix
 -----------------------------
 
-We can also easily view the payoff matrix described in :doc:`payoff_matrix`, this
-becomes particularly useful when viewing the outputs of tournaments with a large
-number of strategies::
+We can also easily view the payoff matrix described in
+:ref:`tournament-results`, this becomes particularly useful when viewing the
+outputs of tournaments with a large number of strategies::
 
     >>> p = plot.payoff()
     >>> p.show()