Do not overwrite files when there are no diffs in Overwrite mode
Do not overwrite files when there are no diffs in Overwrite mode

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