character limit in textedit?

Thinksamuel's icon

Another question concerning textedit. It seems that there is a limit in characters. With the attached patch I exaggerated off course with the amount of characters but I would like to know why he is cutting off at that number of characters

999.text.maxpat
Max Patch
Ad.'s icon

it's because of the comma.

Thinksamuel's icon

Thanks. Are there other characters that I should not use besides the comma?