chains: treat some string lits as blocks
chains: treat some string lits as blocks

SingingTree/rustfmt,graydon/rust,graydon/rust,aidancully/rust,aidancully/rust,graydon/rust,aidancully/rust,aidancully/rust,aidancully/rust,graydon/rust,graydon/rust,graydon/rust,rust-lang/rustfmt,rust-lang/rustfmt,aidancully/rust,SingingTree/rustfmt