uniq not working

[Felipe Vieira]

Dear mailing list,

the uniq program seems to be faulty on my cygwin:

/tmp » cat u.txt
1
2
3
4
5
1
2
3
6
7
8


/tmp » uniq -c u.txt
      1 1
      1 2
      1 3
      1 4
      1 5
      1 1
      1 2
      1 3
      1 6
      1 7
      1 8
      1
/tmp »

As you can see it does not eliminate duplicate lines.
This file was created with vim. Same results if created with windows notepad.
What am I missing?

Best,

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