Mon, 09 Mar 2015 11:32:32 +0100 wenzelm eliminated unused arith "verbose" flag -- tools that need options can use the context;
Mon, 09 Mar 2015 11:21:00 +0100 wenzelm eliminated dead code (cf. 5e5c36b051af);
Mon, 09 Mar 2015 10:52:23 +0100 wenzelm tuned;
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