def readline(self):
if self.line_number >= self.total_lines:<EOL><INDENT>return '<STR_LIT>'<EOL><DEDENT>line = self.lines[self.line_number]<EOL>self.line_number += <NUM_LIT:1><EOL>if self.indent_char is None and line[:<NUM_LIT:1>] in WHITESPACE:<EOL><INDENT>self.indent_char = line[<NUM_LIT:0>]<EOL><DEDENT>return line<EOL>
Get the next line from the input buffer.