Term::Table::LineBreak: methods undocumented; columns() not tested

[jkeenan]

I have begun to study the Test2-Suite and Term-Table distributions on CPAN in anticipation of their being brought into the Perl core distribution. I ran Term-Table through Devel::Cover and got the coverage report presented earlier today in #15.

By my count lib/Term/Table/LineBreak.pm has 4 publicly available methods. None of these are documented. The columns method here is not exercised by Term-Table's test suite.

It would be good to get these subroutines documented and fully exercised by the test suite.