Don't print config file by default (#1313)
Don't print config file by default (#1313)

Supress `Using rusftmt config file...` messages unless the --verbose
flag is given.
aidancully/rust,aidancully/rust,SingingTree/rustfmt,aidancully/rust,graydon/rust,rust-lang/rustfmt,aidancully/rust,aidancully/rust,graydon/rust,graydon/rust,rust-lang/rustfmt,graydon/rust,Emilgardis/rustfmt,SingingTree/rustfmt,graydon/rust,graydon/rust,aidancully/rust,Emilgardis/rustfmt