Thu, 11 Apr 2019 14:22:52 +0200 wenzelm allow faster navigation of directory hierarchy (reverting 69465c3e3560);
Thu, 11 Apr 2019 12:41:50 +0200 wenzelm more robust test: avoid spurious Interrupt (stack overflow?) due to List.fun_lub_parametric;
Thu, 11 Apr 2019 12:38:22 +0200 wenzelm prefer local options;
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