Function wrap

crates/flowtrace-cli/src/explain.rs:554–578

Simple word-wrap for the description block.

(text: &str, width: usize)

/// Simple word-wrap for the description block.
fn wrap(text: &str, width: usize) -> Vec<String> {
    let mut out: Vec<String> = vec![];
    for paragraph in text.split('\n') {
        let mut line = String::new();
        for word in paragraph.split_whitespace() {
            if line.is_empty() {
                line.push_str(word);
            } else if line.len() + 1 + word.len() <= width {
                line.push(' ');
                line.push_str(word);
            } else {
                out.push(line.clone());
                line.clear();
                line.push_str(word);
            }
        }
        if !line.is_empty() {
            out.push(line);
        }
    }
    if out.is_empty() {
        out.push(String::new());
    }
    out
}

#[cfg(test)]
mod tests {