Function clippy_lints::utils::expr_block

pub fn expr_block<'a, 'b, T: LintContext<'b>>(cx: &T,
                                              expr: &Expr,
                                              option: Option<String>,
                                              default: &'a str)
                                              -> Cow<'a, str>

Like snippet_block, but add braces if the expr is not an ExprBlock. Also takes an Option<String> which can be put inside the braces.