=over =item IO::Handle->format_line_break_characters EXPR =item $FORMAT_LINE_BREAK_CHARACTERS =item $: X<$:> X The current set of characters after which a string may be broken to fill continuation fields (starting with ^) in a format. Default is S<" \n-">, to break on whitespace or hyphens. (Mnemonic: a "colon" in poetry is a part of a line.) =back