[Rd] substitute inconsistent output

Jan Gorecki j@goreck| @end|ng |rom w|t@edu@p|
Wed Mar 18 06:36:37 CET 2020

Dear R-devel,

Is there anything that we can do to make output of those call more
consistent? So the first one will return `c(1L, 2L)` rather than
`1:2`. Note that it is not related to compact integer sequence
introduced by altrep, it is reproducible on R 3.1.0 as well.

substitute(v+x, list(x=c(1L,2L)))
#v + 1:2
substitute(v+x, list(x=c(0L,2L)))
#v + c(0L, 2L)

Thank you,
Jan Gorecki

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