Doctest Mode: Walk-Through (6/8)

Type "control-c control-n" to move to the next failed example (or just move the cursor down to it), and use "control-c control-r" to update its output. Update the third example's output as well.

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Hello world.  This file will contain some simple tests.

    >>> len('european swallow')
    16
    >>> 'european swallow'.count('a')
    2
    >>> for word in 'european swallow'.split():
    ...     print word, len(word)
    european 8
    swallow 7
    .












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