This is Perl module Test::Script::Shebang.

INSTALLATION

Test::Script::Shebang installation is straightforward. If your CPAN shell is set up,
you should just be able to do

   % cpan Test::Script::Shebang

Download it, unpack it, then build it as per the usual:

   % perl Makefile.PL
   % make && make test

Then install it:

   % make install

DOCUMENTATION

Test::Script::Shebang documentation is available as in POD. So you can do:

   % perldoc Test::Script::Shebang

to read the documentation online with your favorite pager.

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