[issue37759] Polish whatsnew for 3.8

[Raymond Hettinger]

Raymond Hettinger <raymond.hettinger at gmail.com> added the comment:


New changeset 3ac152948d63f52267d312be33306067d3847e2a by Raymond Hettinger (Miss Islington (bot)) in branch '3.8':
bpo-37759: Add examples for the new typing features (GH-16763) (GH-16764)
https://github.com/python/cpython/commit/3ac152948d63f52267d312be33306067d3847e2a


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