QuestionMark,
/// Well-formed checking. If a `WellFormedLoc` is provided,
- /// then it will be used to eprform HIR-based wf checking
+ /// then it will be used to perform HIR-based wf checking
/// after an error occurs, in order to generate a more precise error span.
/// This is purely for diagnostic purposes - it is always
/// correct to use `MiscObligation` instead, or to specify