fix dangling keyfunc examples in documentation of heapq and sorted (#1432)
* fix dangling mention of key=str.lower in heapq doc * Fix dangling mention of keyfunc example for sorted()
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@ -1412,8 +1412,8 @@ are always available. They are listed here in alphabetical order.
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Has two optional arguments which must be specified as keyword arguments.
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*key* specifies a function of one argument that is used to extract a comparison
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key from each list element: ``key=str.lower``. The default value is ``None``
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(compare the elements directly).
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key from each element in *iterable* (for example, ``key=str.lower``). The
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default value is ``None`` (compare the elements directly).
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*reverse* is a boolean value. If set to ``True``, then the list elements are
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sorted as if each comparison were reversed.
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@ -112,17 +112,17 @@ The module also offers three general purpose functions based on heaps.
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Return a list with the *n* largest elements from the dataset defined by
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*iterable*. *key*, if provided, specifies a function of one argument that is
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used to extract a comparison key from each element in the iterable:
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``key=str.lower`` Equivalent to: ``sorted(iterable, key=key,
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reverse=True)[:n]``
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used to extract a comparison key from each element in *iterable* (for example,
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``key=str.lower``). Equivalent to: ``sorted(iterable, key=key,
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reverse=True)[:n]``.
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.. function:: nsmallest(n, iterable, key=None)
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Return a list with the *n* smallest elements from the dataset defined by
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*iterable*. *key*, if provided, specifies a function of one argument that is
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used to extract a comparison key from each element in the iterable:
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``key=str.lower`` Equivalent to: ``sorted(iterable, key=key)[:n]``
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used to extract a comparison key from each element in *iterable* (for example,
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``key=str.lower``). Equivalent to: ``sorted(iterable, key=key)[:n]``.
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The latter two functions perform best for smaller values of *n*. For larger
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