lib/Tools/getenv
2005-09-01 wenzelm refrain from sorting output;
2004-06-21 kleing Merged in license change from Isabelle2004
2000-11-30 wenzelm /usr/bin/env bash;
2000-11-22 wenzelm tuned;
2000-09-01 wenzelm GPLed;
1997-04-22 wenzelm removed -norc;
1997-03-05 wenzelm improved DESCRIPTION;
1997-03-05 wenzelm added -a, -b options;
1996-12-09 wenzelm added -norc option;
1996-12-04 wenzelm *** empty log message ***
1996-12-02 wenzelm getenv: get value from Isabelle settings.
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