printing of "tbl_df" without "tbl" class broken

[t-kalinowski]

Hello,

I have some datasets in a package that recently stopped printing...
Possibly related to #256

library(tibble)
tmtc <- as_tibble(mtcars)
tmtc
#> # A tibble: 32 x 11
#>      mpg   cyl  disp    hp  drat    wt  qsec    vs    am  gear  carb
#>  * <dbl> <dbl> <dbl> <dbl> <dbl> <dbl> <dbl> <dbl> <dbl> <dbl> <dbl>
#>  1  21.0     6 160.0   110  3.90 2.620 16.46     0     1     4     4
#>  2  21.0     6 160.0   110  3.90 2.875 17.02     0     1     4     4
#>  3  22.8     4 108.0    93  3.85 2.320 18.61     1     1     4     1
#>  4  21.4     6 258.0   110  3.08 3.215 19.44     1     0     3     1
#>  5  18.7     8 360.0   175  3.15 3.440 17.02     0     0     3     2
#>  6  18.1     6 225.0   105  2.76 3.460 20.22     1     0     3     1
#>  7  14.3     8 360.0   245  3.21 3.570 15.84     0     0     3     4
#>  8  24.4     4 146.7    62  3.69 3.190 20.00     1     0     4     2
#>  9  22.8     4 140.8    95  3.92 3.150 22.90     1     0     4     2
#> 10  19.2     6 167.6   123  3.92 3.440 18.30     1     0     4     4
#> # ... with 22 more rows
rlang::set_attrs(tmtc, class = c("tbl_df", "data.frame"))
#> Error in format.default(x[[i]], ..., justify = justify): argument 2 matches multiple formal arguments

[krlmlr]

Thanks. Subsequent versions of tibble will complain louder and louder if a tibble doesn't have the tbl class, for now we'll keep it compatible.

[github-actions]

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