updated contents from Atlas repo

iterables/sentence_genexp.doctest

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+>>> from sentence_genexp import Sentence
+>>> s = Sentence('The time has come')
+>>> s
+Sentence('The time has come')
+>>> list(s)
+['The', 'time', 'has', 'come']
+>>> it = iter(s)
+>>> next(it)
+'The'
+>>> next(it)
+'time'
+>>> next(it)
+'has'
+>>> next(it)
+'come'
+>>> next(it)
+Traceback (most recent call last):
+  ...
+StopIteration
+
+>>> s = Sentence('"The time has come," the Walrus said,')
+>>> s
+Sentence('"The time ha... Walrus said,')
+>>> list(s)
+['The', 'time', 'has', 'come', 'the', 'Walrus', 'said']
+
+
+>>> s = Sentence('''"The time has come," the Walrus said,
+... "To talk of many things:"''')
+>>> s
+Sentence('"The time ha...many things:"')
+>>> list(s)
+['The', 'time', 'has', 'come', 'the', 'Walrus', 'said', 'To', 'talk', 'of', 'many', 'things']
+
+
+>>> s = Sentence('Agora vou-me. Ou me vão?')
+>>> s
+Sentence('Agora vou-me. Ou me vão?')
+>>> list(s)
+['Agora', 'vou', 'me', 'Ou', 'me', 'vão']