remove unnecessary emphasis in doc comment
remove unnecessary emphasis in doc comment

During review of the previous commit, @joshtriplett noticed that
the emphasis on 'the same' is unnecessary. For consistency, remove it
on the offset() functions, as well.

GBGamer/rust,GBGamer/rust,GBGamer/rust,graydon/rust,GBGamer/rust,graydon/rust,GBGamer/rust,aidancully/rust,GBGamer/rust,aidancully/rust,GBGamer/rust,graydon/rust,graydon/rust,GBGamer/rust,aidancully/rust,graydon/rust,graydon/rust,aidancully/rust,aidancully/rust,aidancully/rust