sort and leading blanks

[Mike Frysinger]

a user reported an issue with coreutils' sort and -b/-k usage.  it seems to be 
a regression from 5.x -> 6.x, or maybe a bug fix :).

the simple case:
$ printf 'a b c\na  b c\n' | sort -u -b -k1,1
a b c
a  b c

the user contests that there should only be one line displayed (and that is 
how coreutils-5 seems to have behaved).

rather than me copying & pasting a lot of info, here's the URL:
http://bugs.gentoo.org/263723
-mike

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