cygwyn: latexmlc tests try to create /dev directory

[xworld21]

Error message

t/91_latexmlc_api.t ....... 1/3 Couldn't create log directory /dev: Read-only file system at /home/pmtvlm/LaTeXML/t/../blib/script/latexmlc line 53.

That seems to snowball into lots of failed tests.

[xworld21]

Quick note in case I forget: the problem is here.

LaTeXML/lib/LaTeXML/Util/Pathname.pm

Line 252 in 25ec2b0

my (@dirs) = (File::Spec->splitdir($dirs), $last);

Appending $last breaks the property that catdir and splitdir are approximately inverses of each other. More precisely, splitdir("/dev") is ("","dev") while (splitdir("/"),"dev") is ("","","dev"). Thus catdir produces //dev/, because on Cygwin that's a network path, so // is not canonicalised down to /.

The proper fix is to not append $last.