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2a0d241f69
* src/group-list.h (print_group_list): Add a parameter for the delimiter of type char. * src/group-list.c (print_group_list): Likewise, and use it instead of a white space character to delimit the group entries. * src/groups.c (main): Pass white space character to print_group_list(). * src/id.c (longopts): Add array element for the new long option. (usage): Document the new option. While at it, fix the alignment of the descriptions to match that of HELP_OPTION_DESCRIPTION. (main): Define the bool flag opt_zero indicating the use of the new option. In the getopt_long loop, handle it. Output an error diagnostic in the case the --zero option has been specified together with the default format. In the case of -gG, pass either a NUL or a white space character to print_group_list() - depending on the above new flag. Likewise change the printing of the final newline character: output a NUL instead if the --zero option has been specified. * doc/coreutils.texi (id invocation): Document the new option. While at it, move the @exitstatus macro down after the macro @primaryAndSupplementaryGroups in order to be consistent with other texinfo documents. (groups invocation): Move @exitstatus down after the macro @primaryAndSupplementaryGroups here, too. * tests/misc/id-zero.sh: Add new test exercising the new option. * tests/local.mk (all_tests): Reference it. * NEWS (New features): Mention the new option. Fixes http://bugs.gnu.org/9987