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-*- outline -*-  

* Summary of Changes for Proof General 4.0 from 3.7.X

** Generic changes

*** XEmacs is no longer supported; PG only works with GNU Emacs 22.2+

*** Font-lock based Unicode Tokens mode replaces X-Symbol

*** X-Symbol is no longer used or bundled

*** Removed configuration options
    proof-toolbar-use-button-enablers  (now always enabled)