Can we improve on this `across()` error?

[DavisVaughan]

library(dplyr)

df <- tibble(x = 1:2, y = 3:4)

fn <- function(col) {
  stop("oh no")
}

mutate(df, across(y, fn))
#> Error in `mutate()`:
#> ℹ In argument: `across(y, fn)`.
#> Caused by error in `across()`:
#> ! Can't compute column `y`.
#> Caused by error:
#> ! oh no

It can probably just be:

#> Error in `mutate()`:
#> ℹ In argument: `across(y, fn)`.
#> ℹ In column: `y`.
#> Caused by error:
#> ! oh no

As mentioned here #6704 (comment)

Thrown from here, so seems plausible that we could improve on this

dplyr/R/mutate.R

Lines 382 to 388 in 49b39af

	chunks <- withCallingHandlers(
	mask$eval_all_mutate(quo),
	error = function(cnd) {
	msg <- glue("Can't compute column `{quo_data$name_auto}`.")
	abort(msg, call = call("across"), parent = cnd)
	}
	)