> vars_rename(c("a", "b"), d = e, .strict = TRUE)
Error: Can't rename columns that don't exist.
x Column `e` doesn't exist.

> vars_rename(c("a", "b"), d = e, f = g, .strict = TRUE)
Error: Can't rename columns that don't exist.
x Column `e` doesn't exist.

> vars_rename(c("a", "b"), d = "e", f = "g", .strict = TRUE)
Error: Can't rename columns that don't exist.
x Column `e` doesn't exist.

