def strip_line(line)
      file_format.line_definitions.any? { |_name, definition| definition =~ line } ? line : ''
    end
def strip_line(line)
      file_format.line_definitions.any? { |_name, definition| definition =~ line } ? line : ''
    end
Returns the line itself if the string matches any of the line definitions. If no match is
 found, an empty line is returned, which will strip the line from the output.
 <tt>line</tt> The line to strip