0.08
    Fix and improve diagostics

0.09
    Add an is_string_nows() function (RT #14018)

0.10
    Better implementation of _common_prefix_length
    by Tassilo von Parseval

0.11
    Require a more recent Test::Builder::Tester,
    since tests fail with 1.03.

0.12
    Show longest common substring in diagnostics
    (Breno G. de Oliveira)

0.13
    Allow to display LCSS output in diagnostics