Function block 

pub fn block<T: Pretty>(content: T) -> Join<Indent<Join<Sep, T>>, Sep>

Wrap a pretty-printable value so that it will display as an indented block when broken across multiple lines.

When displayed on a single line, block has no effect.

When displayed on multiple lines, block inserts appropriate newlines before and after its content.

block(x) is equivalent to Indent(Sep(0).join(x)).join(Sep(0)).

Examples

Basic usage:

use pretty_trait::{JoinExt, Sep, block, to_string};

let max_line = Some(10);
let tab_size = 2;

let expected_broken = "\
(
  hello
  world
)";

let blocked = "(".join(block("hello".join(Sep(1)).join("world"))).join(")");

assert_eq!(
    to_string(&blocked, max_line, tab_size),
    expected_broken,
);

// When displayed on one line, block has no effect:

let expected_unbroken = "(hello world)";

assert_eq!(
    to_string(&blocked, None, tab_size),
    expected_unbroken,
);