[texdoc] Wrong result for XeTeX

[Bruno Voisin]

Currently "texdoc xetex" opens the unimath-plain-xetex doc instead of xetex-reference.

Here's what I'm getting:

% texdoc -l xetex
33 results. Display them all? (y/N) y
 1 /usr/local/texlive/2022/texmf-dist/doc/xetex/unimath-plain-xetex/unimath-plain-xetex-doc.pdf
   = Package documentation
 2 /usr/local/texlive/2022/texmf-dist/doc/xetex/xetexref/xetex-reference.pdf
   = The document itself
 3 /usr/local/texlive/2022/texmf-dist/doc/generic/knuth-hint/xetex/xetex.pdf
 4 /usr/local/texlive/2022/texmf-dist/doc/generic/knuth-pdf/xetex/xetex.pdf
 5 /usr/local/texlive/2022/texmf-dist/doc/xetex/base/XeTeX-notes.pdf
   = About XeTeX
 [....]


Bruno Voisin