Fix typo in 3.7 What's New (GH-3069)

Remove unneeded word `to`.
diff --git a/Doc/whatsnew/3.7.rst b/Doc/whatsnew/3.7.rst
index 21e9c56..a92ad9f 100644
--- a/Doc/whatsnew/3.7.rst
+++ b/Doc/whatsnew/3.7.rst
@@ -247,7 +247,7 @@
 urllib.parse
 ------------
 
-:func:`urllib.parse.quote` has been updated to from RFC 2396 to RFC 3986,
+:func:`urllib.parse.quote` has been updated from RFC 2396 to RFC 3986,
 adding `~` to the set of characters that is never quoted by default.
 (Contributed by Christian Theune and Ratnadeep Debnath in :issue:`16285`.)