-d, --repeated only print duplicate lines, one for each group\n\
"), stdout);
fputs (_("\
- -D print all duplicate lines\n\
- --all-repeated[=METHOD] like -D, but allow separating groups\n\
- with an empty line;\n\
- METHOD={none(default),prepend,separate}\n\
+ -D, --all-repeated[=METHOD] print all duplicate lines,\n\
+ optionally separating groups with an empty line;\n\
+ METHOD={none(default),prepend,separate}\n\
"), stdout);
fputs (_("\
-f, --skip-fields=N avoid comparing the first N fields\n\