'Process lines for subsequent use.  In the default case do nothing.
This routine is not generally intended for removing comment lines or
stripping whitespace.  These are done (if needed) in the header and
data line processing.
Override this method if something more has to be done to convert raw
input lines to the table rows.  For example the
ContinuationLinesInputter derived class accounts for continuation
characters if a row is split into lines.'

def process_lines(self, lines):

    return lines
