R devel - Oct 2021 - Bug 18208 - tools:::latexToUtf8(tools::parseLatex("\\'i")) should generate í

tools:::latexToUtf8() doesn't convert the LaTeX accented character
"\\'i<file://'i>" to  ? (see Bug #18208
https://bugs.r-project.org/show_bug.cgi?id=18208,  reported by Manuel
L?pez-Ib??ez for details and justification). For example:
>
tools:::latexToUtf8(tools::parseLatex("\\'i<file://'i>"))
\'i

It does the conversion if i is replaced by '\i':
>
tools:::latexToUtf8(tools::parseLatex("\\'\\i<file://'//i>"))
?

Both are acceptable in LaTeX.

I think that this can be fixed by adding a line to the definition of
makeLatexTable() in R/src/library/tools/R/parseLatex.R, just before it returns:

makeLatexTable <- function(utf8table)
{
    ...

    table[["\\textemdash<file://textemdash>"]] <-
"\u2014"
    latexArgCount[["\\textemdash<file://textemdash>"]] <<-
0

    table$"\\'"$"i"  <-
table$"\\'"$"\\i<file://i>"    # Georgi

    table
}

I can submit a patch if I get access  to bugzilla.

After building R-devel svn 81022 from 2021-10-08 with the above change, we get
what we want:
>
tools:::latexToUtf8(tools::parseLatex("\\'i<file://'i>"))
?
>
tools:::latexToUtf8(tools::parseLatex("\\'\\i<file://'//i>"))
?
Georgi Boshnakov





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