Fw: bug in texi2dvi, and hack patch

[Karl Berry]

    if { test -x "$dir/$1" && test -f "$dir/$1"; } ||
       { test -x "$dir/$1.exe" && test -f "$dir/$1.exe"; }; then

This seems sensible.  I can't actually test it, since I don't have
either Cygwin or DJPP, but at least it is symmetric.

Stepan, do you have an objection to it?

Thanks,
k

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