nit: minor edit
Make the sentence logically flow better (english?)
@@ -172,8 +172,8 @@ type StepWrapper interface {
// Wrap is called during (Step).UnmarshalJSON whenever an 'inner' step is
// parsed.
//
- // Modifier step types should implement this function by assigning to an
- // internal field, that has a `json:"-"` tag, the passed in StepConfig.
+ // Modifier step types should implement this function by assigning the
+ // passed in StepConfig to an internal field that has a `json:"-"` tag.
Wrap(StepConfig)
// Unwrap is called during (Step).MarshalJSON and must return the wrapped
