make format_string and fmt_lines private
make format_string and fmt_lines private

SingingTree/rustfmt,aidancully/rust,aidancully/rust,flutterhash/rustfmt,graydon/rust,aidancully/rust,graydon/rust,graydon/rust,Emilgardis/rustfmt,Emilgardis/rustfmt,aidancully/rust,graydon/rust,SingingTree/rustfmt,aidancully/rust,aidancully/rust,graydon/rust,studoot/rustfmt,graydon/rust,rust-lang/rustfmt,rust-lang/rustfmt,studoot/rustfmt