fix dangling keyfunc examples in documentation of heapq and sorted (GH-1432)
* fix dangling mention of key=str.lower in heapq doc
* Fix dangling mention of keyfunc example for sorted()
(cherry picked from commit 6bdb6f7675922e601e742758c7c240a751fd365b)
Co-authored-by: Wolfgang Maier <wolfgang.maier@biologie.uni-freiburg.de>
diff --git a/Doc/library/functions.rst b/Doc/library/functions.rst
index bb47286..c0f4ffd 100644
--- a/Doc/library/functions.rst
+++ b/Doc/library/functions.rst
@@ -1405,8 +1405,8 @@
Has two optional arguments which must be specified as keyword arguments.
*key* specifies a function of one argument that is used to extract a comparison
- key from each list element: ``key=str.lower``. The default value is ``None``
- (compare the elements directly).
+ key from each element in *iterable* (for example, ``key=str.lower``). The
+ default value is ``None`` (compare the elements directly).
*reverse* is a boolean value. If set to ``True``, then the list elements are
sorted as if each comparison were reversed.
diff --git a/Doc/library/heapq.rst b/Doc/library/heapq.rst
index 0b1a3c8..8b00f7b 100644
--- a/Doc/library/heapq.rst
+++ b/Doc/library/heapq.rst
@@ -112,17 +112,17 @@
Return a list with the *n* largest elements from the dataset defined by
*iterable*. *key*, if provided, specifies a function of one argument that is
- used to extract a comparison key from each element in the iterable:
- ``key=str.lower`` Equivalent to: ``sorted(iterable, key=key,
- reverse=True)[:n]``
+ used to extract a comparison key from each element in *iterable* (for example,
+ ``key=str.lower``). Equivalent to: ``sorted(iterable, key=key,
+ reverse=True)[:n]``.
.. function:: nsmallest(n, iterable, key=None)
Return a list with the *n* smallest elements from the dataset defined by
*iterable*. *key*, if provided, specifies a function of one argument that is
- used to extract a comparison key from each element in the iterable:
- ``key=str.lower`` Equivalent to: ``sorted(iterable, key=key)[:n]``
+ used to extract a comparison key from each element in *iterable* (for example,
+ ``key=str.lower``). Equivalent to: ``sorted(iterable, key=key)[:n]``.
The latter two functions perform best for smaller values of *n*. For larger