don't be fooled by tabbed lines in prereq output

don't be fooled by tabbed lines in prereq output

see XML::Parser::Style::EasyTree with the following output:
=== BEGIN OUTPUT ===
[...]
==> Auto-install the 1 mandatory module(s) from CPAN? [y]

*** Since we're running under CPANPLUS, I'll just let it take care
    of the dependency's installation later.
*** Module::AutoInstall configuration finished.
[...]
=== END OUTPUT ===

we need to be smart and not count this tabbed line