[R-pkg-devel] Error: Symbol \textasciigrave not provided by (textcomp)

[Spencer Graves]

Hello, All:


       "R CMD check Ecfun_0.2-4.tar.gz" ends with 8 repetitions of the 
following:


! Package textcomp Error: Symbol \textasciigrave not provided by
(textcomp)                font family zi4 in TS1 encoding.
(textcomp)                Default family used instead.

See the textcomp package documentation for explanation.
* checking PDF version of manual without hyperrefs or index ... ERROR
* DONE


       This is using R 3.6.2 under macOS 10.15.3 applied to the current 
development version of "https://github.com/sbgraves237/Ecfun".  Travis 
CI reported that the build passed;  see 
"https://travis-ci.org/sbgraves237/Ecfun/builds/650505913?utm_medium=notification&utm_source=email". 



       This looks to me like it's complaining about the use of the back 
tick character ("`", below "~" on the top left key on a standard 
American English keyboard), which I assume is equivalent to 
"\textasciigrave" in certain contexts.


       Six out of those 8 repetitions occur in the examples sections of 
files "grepNonStandardCharacters.Rd", "subNonStandardCharacters.Rd", and 
"subNonStandardNames.Rd".  Those functions were written to fix parsing 
errors with names like "Raúl" that had been mangled by different 
software before I could get it into R.


       After a day's work failed to produce a work around, I decided to 
ask this group.


       What do you suggest?
       Thanks,
       Spencer Graves