small uniq trick

[Giorgos D. Pallas]

Φρίξος wrote:
>
> OK, I'm stupid. Giati 2 uniq? Meta thn prwth den feygoun OLA ta repetitions

Όχι γιατί το manual λέει (keyword: successive)

DESCRIPTION
       Discard  all but one of successive identical lines from INPUT (or 
standard input), writing to OUTPUT (or stan-
       dard output).

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