Error when compiling refcards (emacs-25 branch)

[Nicolas Petton <nicolas@petton.fr>]

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hi,

I get an error when compiling the polish refcard on emacs-25, both under
Debian Stable and Fedora 24.

On both systems I have texlive-full installed, which includes the MeX
package.

Here's the output:

    if ! kpsewhich -format=fmt mex > /dev/null && \
      ! pdfmex --version > /dev/null 2> /dev/null; then \
      echo "No mex format found."; false; \
    fi
    TEXINPUTS=".:" pdftex -output-format=pdf pl-refcard.tex
    This is pdfTeX, Version 3.14159265-2.6-1.40.16 (TeX Live 2016/dev) (preloaded format=mex)
     restricted \write18 enabled.
    entering extended mode
    (./pl-refcard.tex
    This is MeX  Version 1.05  18 XII 1993  (B. Jackowski & M. Ry\'cko)
    (./pdflayout.sty (/usr/share/texlive/texmf-dist/tex/generic/oberdiek/ifpdf.sty)
    ) (./emacsver.tex) [2 columns per page] [1{/usr/share/texlive/texmf-dist/fonts/
    map/pdftex/updmap/pdftex.map}] [2] [3]
    ! MeX error: Illegal pair of characters  /r  occured.
    \P@lerr ...and /\noexpand #1\space \space occured}
                                                      \endgroup


This goes beyond my knowledge of LaTeX.

Cheers,
Nico

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