Confusing x column in debug output for separate_wider_delim

[iimog]

The "Strings" chapter has an example for debugging widening problems. However, due to the fact that both the original column and one of the output columns are named x, the output is a bit confusing:

df <- tibble(x = c("1-1-1", "1-1-2", "1-3", "1-3-2", "1"))

debug <- df |> 
  separate_wider_delim(
    x,
    delim = "-",
    names = c("x", "y", "z"),
    too_few = "debug"
  )
#> Warning: Debug mode activated: adding variables `x_ok`, `x_pieces`, and
#> `x_remainder`.
debug
#> # A tibble: 5 × 6
#>   x     y     z     x_ok  x_pieces x_remainder
#>   <chr> <chr> <chr> <lgl>    <int> <chr>      
#> 1 1-1-1 1     1     TRUE         3 ""         
#> 2 1-1-2 1     2     TRUE         3 ""         
#> 3 1-3   3     <NA>  FALSE        2 ""         
#> 4 1-3-2 3     2     TRUE         3 ""         
#> 5 1     <NA>  <NA>  FALSE        1 ""

The column x still has the original content, and while there are columns for the new y and z the new x column is missing. This can easily be resolved by using a different column name for the original column:

df <- tibble(a = c("1-1-1", "1-1-2", "1-3", "1-3-2", "1"))

debug <- df |> 
  separate_wider_delim(
    a,
    delim = "-",
    names = c("x", "y", "z"),
    too_few = "debug"
  )
#> Warning: Debug mode activated: adding variables `x_ok`, `x_pieces`, and
#> `x_remainder`.
debug
#> # A tibble: 5 × 7
#>   x     y       z       a     a_ok  a_pieces a_remainder
#>   <chr> <chr>   <chr>   <chr> <lgl>    <int> <chr>      
#> 1 1     1       1       1-1-1 TRUE         3 ""         
#> 2 1     1       2       1-1-2 TRUE         3 ""         
#> 3 1     3       <NA>    1-3   FALSE        2 ""         
#> 4 1     3       2       1-3-2 TRUE         3 ""         
#> 5 1     <NA>    <NA>    1     FALSE        1 ""

I'm happy to create a pull request if you agree that this should be fixed.