chore: cosmetic & fix.

pkg/aa/preamble.go

@@ -6,24 +6,21 @@ package aa
 
 import (
 	"slices"
+)
 
 const (
 	tokABI      = "abi"
 	tokALIAS    = "alias"
 	tokINCLUDE  = "include"
 	tokIFEXISTS = "if exists"
+	tokVARIABLE = "@{"
+	tokCOMMENT  = "#"
 )
 
 type Comment struct {
 	RuleBase
 }
 
-func newCommentFromRule(rule rule) (Rule, error) {
-	base := newRuleFromRule(rule)
-	base.IsLineRule = true
-	return &Comment{RuleBase: base}, nil
-}
-
 func (r *Comment) Less(other any) bool {
 	return false
 }
@@ -152,8 +149,6 @@ type Variable struct {
 	Define bool
 }
 
-}
-
 func (r *Variable) Less(other any) bool {
 	o, _ := other.(*Variable)
 	if r.Name != o.Name {