Greek letters in figures not getting rendered properly with pkgdown 1.6.0 on R-devel (Windows machine)

[IndrajeetPatil]

Minimal reprex package here (with session info):
https://indrajeetpatil.github.io/minimalReprex/articles/test.html#issue-1400-1

• Observed (web browsers used: Chrome and Firefox):

• Expected:

[aphalo]

I see the same in my packages. Problem also affects axis labels. This is under Windows 10 x64 Pro. R 4.0.2 x64. 'pkgdown' 1.6.1. Build of pkg documentation also takes much longer than before.
Downgrading to 'pkgdown' 1.5.1 fixes the problem.

[thomasp85]

What do you get when you call systemfonts::match_font("Symbol")?

[aphalo]

systemfonts::match_font("Symbol")
#> $path
#> [1] "C:\\Windows\\Fonts\\symbol.ttf"
#> 
#> $index
#> [1] 0
#> 
#> $features
#> NULL

^{Created on 2020-09-17 by the reprex package (v0.3.0)}

[aphalo]

sessionInfo()
#> R version 4.0.2 (2020-06-22)
#> Platform: x86_64-w64-mingw32/x64 (64-bit)
#> Running under: Windows 10 x64 (build 18363)
#> 
#> Matrix products: default
#> 
#> locale:
#> [1] LC_COLLATE=English_Finland.1252  LC_CTYPE=English_Finland.1252   
#> [3] LC_MONETARY=English_Finland.1252 LC_NUMERIC=C                    
#> [5] LC_TIME=English_Finland.1252    
#> 
#> attached base packages:
#> [1] stats     graphics  grDevices utils     datasets  methods   base     
#> 
#> loaded via a namespace (and not attached):
#>  [1] compiler_4.0.2  magrittr_1.5    htmltools_0.5.0 tools_4.0.2    
#>  [5] parallel_4.0.2  yaml_2.2.1      stringi_1.5.3   rmarkdown_2.3  
#>  [9] highr_0.8       knitr_1.29      stringr_1.4.0   xfun_0.17      
#> [13] digest_0.6.25   rlang_0.4.7     evaluate_0.14

^{Created on 2020-09-17 by the reprex package (v0.3.0)}

[thomasp85]

This is an issue in ragg (I would argue it is an issue in Windows but that won't get me far🙂). Closing here r-lib/ragg#51 is tracking the same issue in the ragg repo