modernc.org/knuth@v0.0.4/web/testdata/ctan.org/tex-archive/systems/knuth/dist/tex/glue.ch (about)

     1  @x
     2  @d decr(#) == #:=#-1 {decrease a variable by unity}
     3  @y
     4  @d decr(#) == #:=#-1 {decrease a variable by unity}
     5  @d write_ln(#)==writeln(#)
     6  @z