Apostrophes are serious business

gigaparsec.go

@@ -134,7 +134,7 @@ func MessageEnd(pos uint64, expected ...string) Message {
 }
 
 // MakeState creates a new State.
-// It's mostly useful for testing. You probably don't need it.
+// It’s mostly useful for testing. You probably don’t need it.
 func MakeState[In any](r ReaderAt[In]) State[In] {
 	return State[In]{r: r}
 }
@@ -145,12 +145,12 @@ type State[In any] struct {
 	pos uint64
 }
 
-// Read fills dst with data from this State's position in the underlying source.
+// Read fills dst with data from this State’s position in the underlying source.
 // It returns the number of data it read and a new State for the position at which
 // the read ended, and an error if the read either (1) failed or (2) reached the
 // end of the source before filling dst. All reads from a given State will return
 // data from the same position the source.
-// If the source had too few data left to fill dst, or if the State's position is
+// If the source had too few data left to fill dst, or if the State’s position is
 // at or past the end of the source, err will be io.EOF.
 func (s State[In]) Read(dst []In) (n uint64, next State[In], err error) {
 	if s.pos > math.MaxInt64 {
@@ -169,7 +169,7 @@ func (s State[In]) Read(dst []In) (n uint64, next State[In], err error) {
 	return uint64(nread), s, err
 }
 
-// Pos returns this State's position.
+// Pos returns this State’s position.
 func (s State[In]) Pos() uint64 {
 	return s.pos
 }