Merge topic 'FindHg-add-WC_INFO'

02a74a7d Help: Add FindHg-WC_INFO topic release notes

Help/release/dev/FindHg-WC_INFO.rst

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+FindHg-WC_INFO
+--------------
+
+* The :module:`FindHg` module gained a new ``Hg_WC_INFO`` macro to
+  help run ``hg`` to extract information about a Mercurial work copy.