def changed_lines(file)
      diff = git.diff_for_file(file)
      GitDiffParser::Patch.new(diff.patch).changed_lines
    end
def changed_lines(file)
      diff = git.diff_for_file(file)
      GitDiffParser::Patch.new(diff.patch).changed_lines
    end
Returns changed lines in modified file.
 @param file [String] Path to modified files.

 @return [Array<GitDiffParser::Line>] Modified lines