From the NannyMUD documentation

LAST CHANGE

2000-12-19

FUNCTION

NAME
        line_break - Breaking of long lines.


SYNTAX
	string line_break(string s [,string pre] [,int width] [,int no_cr])

DESCRIPTION
	Given a long string, fits it into a given width, adding on an
	optional pre-string. If the width is not given, it is taken
	from this_player() using query_cols().

	If you give the no_cr argument, no newline will be added at the
	end of the line-broken string.


EXAMPLE
	line_break("12345678901234567890", "--", 8) gives
        "--123456\n  789012\n  345678\n  90\n"