Fix indentation undistinguish from the next logical line.

def fix_e131(self, result):
        """Fix indentation undistinguish from the next logical line."""
        num_indent_spaces = int(result['info'].split()[1])
        line_index = result['line'] - 1
        target = self.source[line_index]

        spaces_to_add = num_indent_spaces - len(_get_indentation(target))

        if spaces_to_add >= 0:
            self.source[line_index] = (' ' * spaces_to_add +
                                       self.source[line_index])
        else:
            offset = abs(spaces_to_add)
            self.source[line_index] = self.source[line_index][offset:]