%in% being changed to %vin%

[gunnaringle]

When reading in a rule with %in% it sometimes changes the %in% into %vin%.
It has worked for a while but suddenly this error is arising.

Example
library(dcmodify)

dat <- data.frame(A = c(1,2,3),
B = c(3,3,3),
C = c(NA,NA,NA))

rules <- data.frame(rule = "if(A %in% c(2,4,50))C = 4")

r <- modifier(.data = rules)

print(r$assignments())
$M1
C = 4
attr(,"guard")
A %vin% c(2, 4, 50)