Multiline tables with keep.line.breaks = TRUE not working for me

[Aariq]

I'm not sure if this is a pander issue or a rmarkdown issue. The following example doesn't include the manual line breaks like it's supposed to for me. The text output looks correct, but when I include this in a .Rmd document and knit it, the line breaks don't show up.

library(pander)
m <- data.frame('Value\n1', 'Value\n2')
colnames(m) <- c('Multiline\nCol1', 'Multiline\nCol2')
pandoc.table(m, keep.line.breaks = TRUE, style = "multiline")
#> 
#> -----------------------
#>  Multiline   Multiline 
#>    Col1        Col2    
#> ----------- -----------
#>    Value       Value   
#>      1           2     
#> -----------------------

^{Created on 2022-05-27 by the reprex package (v2.0.1)}

Session info

sessionInfo()
#> R version 4.2.0 (2022-04-22)
#> Platform: x86_64-apple-darwin17.0 (64-bit)
#> Running under: macOS Big Sur/Monterey 10.16
#> 
#> Matrix products: default
#> BLAS:   /Library/Frameworks/R.framework/Versions/4.2/Resources/lib/libRblas.0.dylib
#> LAPACK: /Library/Frameworks/R.framework/Versions/4.2/Resources/lib/libRlapack.dylib
#> 
#> locale:
#> [1] en_US.UTF-8/en_US.UTF-8/en_US.UTF-8/C/en_US.UTF-8/en_US.UTF-8
#> 
#> attached base packages:
#> [1] stats     graphics  grDevices utils     datasets  methods   base     
#> 
#> other attached packages:
#> [1] pander_0.6.5
#> 
#> loaded via a namespace (and not attached):
#>  [1] Rcpp_1.0.8.3    digest_0.6.29   withr_2.5.0     magrittr_2.0.3 
#>  [5] reprex_2.0.1    evaluate_0.15   highr_0.9       stringi_1.7.6  
#>  [9] rlang_1.0.2     cli_3.3.0       rstudioapi_0.13 fs_1.5.2       
#> [13] rmarkdown_2.14  tools_4.2.0     stringr_1.4.0   glue_1.6.2     
#> [17] xfun_0.31       yaml_2.3.5      fastmap_1.1.0   compiler_4.2.0 
#> [21] htmltools_0.5.2 knitr_1.39

Word output:

PDF output:

[daroczig]

Like in #358, I'd suggest trying using hard line breaks, e.g.

library(pander)
m <- data.frame('Value\\\n1', 'Value\\\n2')
colnames(m) <- c('Multiline\\\nCol1', 'Multiline\\\nCol2')
pandoc.table(m, keep.line.breaks = TRUE, style = "grid")

I hope this helps, and closing the issue as a related ticket is already opened at #357.