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Summary of Changes for Proof General 2.1
----------------------------------------

* Two new provisional instantiations of Proof General, for:
   ** Isabelle/Isar (new proof language for Isabelle) by 
      Markus Wenzel <wenzelm@informatik.tu-muenchen.de>
   ** Plastic (http://www.dur.ac.uk/CARG/plastic.html)
      by Paul Callaghan <P.C.Callaghan@durham.ac.uk>.

* Documentation improvements.   
  Information added for Coq mode.

* In proof-site.el, the environment variable PROOFGENERAL_ASSISTANTS 
  is examined for the default value of proof-assistants.  This
  means that no editing of proof-site.el should normally be 
  needed now. 

* Support for x-symbol package to beautify 
  input and output with special fonts.
  Patches for Isabelle provided by David von Oheimb.
  (currently incomplete)

* Improvements to Coq mode: better recognition of
  Coq syntax, support for proof-shell-restart-cmd.

* Bug fix for templates in Isabelle theory file mode.

* Bug fix for long-lines with funny characters causing
  ^G's in Solaris.

* Bug fix for case-insensitive matching.  Added 
  proof-case-fold-search configuration variable to
  allow for proof script languages with case-insensitive 
  syntax.

* Other minor bug fixes.