hst: improve doc comments

These now read a lot better both in source and on pkgsite.

Signed-off-by: Ophestra <cat@gensokyo.uk>

hst/instance.go

@@ -12,10 +12,12 @@ import (
 // An ID is a unique identifier held by a running hakurei container.
 type ID [16]byte
 
-// ErrIdentifierLength is returned when encountering a [hex] representation of [ID] with unexpected length.
+// ErrIdentifierLength is returned when encountering a [hex] representation of
+// [ID] with unexpected length.
 var ErrIdentifierLength = errors.New("identifier string has unexpected length")
 
-// IdentifierDecodeError is returned by [ID.UnmarshalText] to provide relevant error descriptions.
+// IdentifierDecodeError is returned by [ID.UnmarshalText] to provide relevant
+// error descriptions.
 type IdentifierDecodeError struct{ Err error }
 
 func (e IdentifierDecodeError) Unwrap() error { return e.Err }
@@ -23,7 +25,10 @@ func (e IdentifierDecodeError) Error() string {
 	var invalidByteError hex.InvalidByteError
 	switch {
 	case errors.As(e.Err, &invalidByteError):
-		return fmt.Sprintf("got invalid byte %#U in identifier", rune(invalidByteError))
+		return fmt.Sprintf(
+			"got invalid byte %#U in identifier",
+			rune(invalidByteError),
+		)
 	case errors.Is(e.Err, hex.ErrLength):
 		return "odd length identifier hex string"
 
@@ -41,7 +46,9 @@ func (a *ID) CreationTime() time.Time {
 }
 
 // NewInstanceID creates a new unique [ID].
-func NewInstanceID(id *ID) error { return newInstanceID(id, uint64(time.Now().UnixNano())) }
+func NewInstanceID(id *ID) error {
+	return newInstanceID(id, uint64(time.Now().UnixNano()))
+}
 
 // newInstanceID creates a new unique [ID] with the specified timestamp.
 func newInstanceID(id *ID, p uint64) error {