skip bug in read_table2 if unpaired quotes in data

[estroger34]

Might be related to #991, which as I understand was fixed in v1.4.0, but bug still exists in read_table2

reprex:

#works as expected:
readr::read_table2('dummy\nvar1 var2 var3\n1 2 3\n4 5 6\n', skip = 1)
#> # A tibble: 2 x 3
#>    var1  var2  var3
#>   <dbl> <dbl> <dbl>
#> 1     1     2     3
#> 2     4     5     6

#fails, note the unpaired quotes after `dummy`
readr::read_table2('dummy"\nvar1 var2 var3\n1 2 3\n4 5 6\n', skip = 1)
#> Warning: Missing column names filled in: 'X1' [1]
#> # A tibble: 0 x 1
#> # ... with 1 variable: X1 <chr>

^{Created on 2021-02-22 by the reprex package (v1.0.0)}

Base R read.table works as expected, btw.

SessionInfo:

R version 4.0.3 (2020-10-10)
Platform: x86_64-w64-mingw32/x64 (64-bit)
Running under: Windows 10 x64 (build 18363)

Matrix products: default

locale:
[1] LC_COLLATE=English_United Kingdom.1252  LC_CTYPE=English_United Kingdom.1252    LC_MONETARY=English_United Kingdom.1252
[4] LC_NUMERIC=C                            LC_TIME=English_United Kingdom.1252    

attached base packages:
[1] stats     graphics  grDevices utils     datasets  methods   base     

other attached packages:
[1] readr_1.4.0  reprex_1.0.0

loaded via a namespace (and not attached):
 [1] rstudioapi_0.13   knitr_1.31        magrittr_2.0.1    hms_1.0.0         R6_2.5.0          rlang_0.4.10     
 [7] highr_0.8         tools_4.0.3       xfun_0.20         cli_2.3.0         clipr_0.7.1       htmltools_0.5.1.1
[13] ellipsis_0.3.1    yaml_2.2.1        assertthat_0.2.1  digest_0.6.27     tibble_3.0.6      lifecycle_1.0.0  
[19] crayon_1.4.1      processx_3.4.5    callr_3.5.1       vctrs_0.3.6       fs_1.5.0          ps_1.5.0         
[25] glue_1.4.2        evaluate_0.14     rmarkdown_2.6     compiler_4.0.3    pillar_1.4.7      pkgconfig_2.0.3