'Remove whitespace at the beginning or end of line.  This is especially useful for
whitespace-delimited files to prevent spurious columns at the beginning or end.
If splitting on whitespace then replace unquoted tabs with space first'

def process_line(self, line):

    if (self.delimiter == '\\s'):
        line = _replace_tab_with_space(line, self.escapechar, self.quotechar)
    return line.strip()
