regress/roff/nr/incr.out_ascii

   1 NR-INCR(1)                  General Commands Manual                 NR-INCR(1)
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   5 N\bNA\bAM\bME\bE
   6        nr-incr - increment a number register by accessing it
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   8 D\bDE\bES\bSC\bCR\bRI\bIP\bPT\bTI\bIO\bON\bN
   9        Roff can count by merely accessing a number register: 1 2 3
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  11        It can also change the step size: 5 7 9
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  13        It can also count down: 6 3 0 -3
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  15        Down in negative steps is up: -1 1 3 5
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  19 OpenBSD                         April 10, 2018                      NR-INCR(1)