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* etc/NEWS: Announce features. * doc/emacs/programs.texi (Hideshow): Document it. * lisp/progmodes/hideshow.el (hs-prefix-map): Bind the new commands. (hs-hide-level-recursive): Simplify. (hs--toggle-all-state): New variable. (hs-toggle-all, hs-cycle): New commands. (hs-get-near-block): New function. (hs-hide-block): Simplify. Co-authored-by: Karthik Chikmagalur <karthikchikmagalur@gmail.com>