[tex-live] Bug#489943: texlive-base-bin: mktexpk does not work in directories containing spaces

[Karl Berry]

     >> So my patch additionally includes a replacement of those two
     >> statements with ${var##pattern} and ${var%pattern} expansions. These
     >> expansions are POSIX and should thus be reasonably portable.

Sorry, POSIX introduced many incompatible shell constructs (and command
line options, and ...) that must be avoided for anything that actually
needs to be portable.