def lines_by_sha(commit_sha)
      `#{File.join(File.dirname(__FILE__), 'reporter', 'git-lines.sh')} #{@config.working_dir} #{commit_sha}`.split("\n")
    end
def lines_by_sha(commit_sha)
      `#{File.join(File.dirname(__FILE__), 'reporter', 'git-lines.sh')} #{@config.working_dir} #{commit_sha}`.split("\n")
    end
Retrieve insertions by commit with a custom script
 @since 0.1.7
 @return [Array]