[Bug 12216] sort: unique deletes to much/wrong lines

[bugzilla at busybox.net]

https://bugs.busybox.net/show_bug.cgi?id=12216

--- Comment #1 from Ron Yorston <rmy at pobox.com> ---
I don't think this is a bug.

Firstly, coreutils 'sort' exhibits the same behaviour.

Secondly, the man page for POSIX 'sort' says that the '-u' option will
"suppress all but one in each set of lines having equal keys" and that the '-n'
option will "restrict the sort key to an initial numeric string". When these
options are combined only the numeric part of the line is used to determine
lines are unique.

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