typos: dictionnary -> dictionary

* doc/org/upgrade2.org, tests/python/prodexpt.py,
tests/python/product.ipynb, NEWS: Fix typos.
* tests/sanity/style.test: Add a check for this.

tests/python/prodexpt.py

@@ -1,6 +1,6 @@
 # -*- mode: python; coding: utf-8 -*-
-# Copyright (C) 2016  Laboratoire de Recherche et Développement
-# de l'Epita
+# Copyright (C) 2016-2017 Laboratoire de Recherche et Développement de l'Epita
+# (LRDE).
 #
 # This file is part of Spot, a model checking library.
 #
@@ -20,7 +20,7 @@
 import spot
 
 # make sure that we are not allowed to build the product of two automata with
-# different dictionnaries.
+# different dictionaries.
 
 aut1 = spot.translate('Xa')
 aut2 = spot.translate('Xb', dict=spot.make_bdd_dict())

tests/python/product.ipynb

@@ -732,7 +732,7 @@
       "\n",
       "We will build an automaton of type `twa_graph`, i.e., an automaton represented explicitely using a graph.  In those automata, states are numbered by integers, starting from `0`.  (Those states can also be given a different name, which is why the the `product()` shows us something that appears to be labeled by pairs, but the real identifier of each state is an integer.)\n",
       "\n",
-      "We will use a dictionnary to keep track of the association between a pair `(ls,rs)` of input states, and its number in the output."
+      "We will use a dictionary to keep track of the association between a pair `(ls,rs)` of input states, and its number in the output."
      ]
     },
     {
@@ -2064,4 +2064,4 @@
    "metadata": {}
   }
  ]
-}
+}