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-rw-r--r--isa/README6
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+Support for Isabelle/classic has been removed from Proof General.
+The default and only supported interface is now Isabelle/Isar.
+
+If you need to use an older version of Isabelle, you will have
+to use an older version of Proof General (and so perhaps an older
+version of Emacs...). Apologies for the incovnenience.