Bug#819560: lintian: Lintian::Relation::implies_inverse doesn't handle << correctly

[Jakub Wilk <jwilk@debian.org>]

Package: lintian
Version: 2.5.42.1

$ perl -MLintian::Relation -E "say Lintian::Relation->new('foo (<< 1)')->implies_inverse('foo (<< 2)')"
1

This is incorrect...

--
Jakub Wilk