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(efaq)Updating Emacs

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How do I update Emacs to the latest version?
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   Note: Installing Emacs, and follow the instructions there for
installation.

   Most files are placed in version-specific directories.  Emacs 21.2,
for instance, places files in `/usr/local/share/emacs/21.2'.

   Upgrading should overwrite only, `/usr/local/bin/emacs' (the Emacs
binary) and documentation in `/usr/local/info'.  Back up these files
before you upgrade, and you shouldn't have too much trouble.