Re: Is one-go stub creation broken or am I using it wrong (or is there a typo in the docs)?
Where do you see a typo? You are quoting a part of the documentation using the right-shift operator, but try to use the left-shift yourself. You should not be surprised that it does not work.
The right-shift operator is used for specifying what a method does or returns. Left-shift is rather used to assign lists of values to variables, e.g. in "where:" blocks, which is a compeletly different thing.