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We do not want an ellipsis displayed following an (abbreviated) SHA-1 value. The days when this was necessary to indicate the truncation to lower-level Git commands and/or the user are bygone. However, to ease the transition, the ellipsis will still be printed if the user sets the environment variable GIT_PRINT_SHA1_ELLIPSIS to "yes". Correct documentation with respect to what describe_detached_head prints when GIT_PRINT_SHA1_ELLIPSIS is not set as indicated above. Add tests for the old and new behaviour. Signed-off-by: Ann T Ropea <bedhanger@gmx.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
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