Add NEWS entry

Use `blurb add` command to assist with adding the NEWS entry.

Author: dhimmel

Misc/NEWS.d/next/Library/2018-02-22-11-24-33.bpo-29636.ogGRE2.rst

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+Add whitespace options for formatting JSON with the ``json.tool`` CLI. The
+following mutually exclusive options are now supported: ``--indent`` for
+setting the indent level in spaces; ``--tab`` for indenting with tabs;
+``--no-indent`` for suppressing newlines; and ``--compact`` for suppressing
+all whitespace. The default behavior remains the same as ``--indent=4``.