Thu, 20 Oct 2022 17:05:06 +0200 wenzelm more informative errors, with optional exception trace as in Command_Line.tool;
Thu, 20 Oct 2022 14:59:39 +0200 wenzelm more robust reset of CLASSPATH: unset variable means "." in certain situations, e.g. scalac;
Wed, 19 Oct 2022 16:01:07 +0200 wenzelm proper chapter for each ROOT file (amending b07f2ff55144);
Thu, 20 Oct 2022 12:57:06 +0100 paulson tidying of ugly legacy proofs
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