Function rustfmt_nightly::string::break_string

fn break_string(
    max_width: usize, 
    trim_end: bool, 
    line_end: &str, 
    input: &[&str]
) -> SnippetState

Break the input string at a boundary character around the offset max_width. A boundary character is either a punctuation or a whitespace. FIXME(issue#3281): We must follow UAX#14 algorithm instead of this.