bpo-36018: Add special value tests and make minor tweaks to the docs (GH-12096)
https://bugs.python.org/issue36018
diff --git a/Doc/library/statistics.rst b/Doc/library/statistics.rst
index a0d4d39..8d961b7 100644
--- a/Doc/library/statistics.rst
+++ b/Doc/library/statistics.rst
@@ -482,9 +482,9 @@
.. class:: NormalDist(mu=0.0, sigma=1.0)
Returns a new *NormalDist* object where *mu* represents the `arithmetic
- mean <https://en.wikipedia.org/wiki/Arithmetic_mean>`_ of data and *sigma*
+ mean <https://en.wikipedia.org/wiki/Arithmetic_mean>`_ and *sigma*
represents the `standard deviation
- <https://en.wikipedia.org/wiki/Standard_deviation>`_ of the data.
+ <https://en.wikipedia.org/wiki/Standard_deviation>`_.
If *sigma* is negative, raises :exc:`StatisticsError`.
@@ -579,7 +579,7 @@
:class:`NormalDist` Examples and Recipes
----------------------------------------
-A :class:`NormalDist` readily solves classic probability problems.
+:class:`NormalDist` readily solves classic probability problems.
For example, given `historical data for SAT exams
<https://blog.prepscholar.com/sat-standard-deviation>`_ showing that scores