Correct the code example in Python 3.7's What's New (GH-5696)

xpvpc · Mariatta · commit b65cb163d6e1 · 2018-02-16T08:46:39.000-08:00
There was an extra dash in the example for re.sub().
diff --git a/Doc/whatsnew/3.7.rst b/Doc/whatsnew/3.7.rst
@@ -1146,7 +1146,7 @@ Changes in the Python API
 
   :func:`re.sub()` now replaces empty matches adjacent to a previous
   non-empty match.  For example ``re.sub('x*', '-', 'abxd')`` returns now
-  ``'-a-b--d-'`` instead of ``'-a-b--d-'`` (the first minus between 'b' and
+  ``'-a-b--d-'`` instead of ``'-a-b-d-'`` (the first minus between 'b' and
   'd' replaces 'x', and the second minus replaces an empty string between
   'x' and 'd').
 
