[R] bgroup not rendering properly

[Derek Ogle]

bgroup() from plotmath does not render properly for me. For example

plot(0,xlim=c(0,1),ylim=c(0,1))
text(0.3,0.5,expression(bgroup('(',atop(x,y),')')))
text(0.7,0.5,expression(group('(',atop(x,y),')')))

and

library(ggplot2)
ggplot(mtcars, aes(wt, mpg)) +
  annotate("text", x=2.5, y=25, label="bgroup('(',atop(x,y),')')",
parse=TRUE) +
  annotate("text", x=3.5, y=25, label="group('(',atop(x,y),')')",
parse=TRUE)

both show a proper (though ugly) result from group() (the second text() or
annotation()) but unrecognizable characters (rather than large parentheses)
from bgroup().

This problematic result occurred for me when using v4.2.2, but not when
using 4.2.0, 4.1.2, 4.1.0, or 4.0.5. My sessionInfo is further below.

I did ask this on stackoverflow
<https://stackoverflow.com/questions/74738827/bgroup-does-not-render-properly-on-ggplot>
where the resulting figures can be seen.


----
R version 4.2.2 (2022-10-31 ucrt)
Platform: x86_64-w64-mingw32/x64 (64-bit)
Running under: Windows 10 x64 (build 19044)

Matrix products: default

locale:
[1] LC_COLLATE=English_United States.utf8
[2] LC_CTYPE=English_United States.utf8
[3] LC_MONETARY=English_United States.utf8
[4] LC_NUMERIC=C
[5] LC_TIME=English_United States.utf8

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

loaded via a namespace (and not attached):
[1] compiler_4.2.2 tools_4.2.2

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