Update a documentation comment to 0.3
@@ -231,14 +231,11 @@ pub trait FutureExt: Future {
IntoStream::new(self)
}
- /// Flatten the execution of this future when the successful result of this
+ /// Flatten the execution of this future when the output of this
/// future is itself another future.
///
/// This can be useful when combining futures together to flatten the
- /// computation out the final result. This method can only be called
- /// when the successful result of this future itself implements the
- /// `IntoFuture` trait and the error can be created from this future's error
- /// type.
+ /// computation out the final result.
///
/// This method is roughly equivalent to `self.then(|x| x)`.
///
