Devel::PPPort with Visual Studio

Recent versions of Devel::PPPort on Windows with Visual Studio built
`perl` fail tests in t\mess.t because $0 is interpolated into regex
patterns without the use of quotemeta[1].

In this case, $0 contains `\` as directory separators.

This is necessary, because nmake tries to interpret part of a filename
as a command line argument if it contains `/` characters.

An easy fix is to use \Q$0\E instead of plain $0 in patterns.

Here's a test report:

http://www.cpantesters.org/cpan/report/e484fd2f-6c51-1014-9811-fe131a8368d1

HTH,

-- Sinan


[1]: https://www.nu42.com/2014/11/youve-gotta-quotemeta.html

• Devel::PPPort with Visual Studio by A. Sinan Unur