Top level comment generates wrong real rule

[hfhbd]

// https://www.ibm.com/docs/en/i/7.1?topic=statements-select-into
select_into_clause ::= INTO host_variable ( COMMA host_variable ) * {
  pin = 1
}

Results into this api:

+public abstract interface class app/softwork/sqldelight/db2dialect/grammar/psi/Db2BindExprReal : com/alecstrong/sql/psi/core/psi/SqlBindExpr {
+}
+

-	public static final field BIND_EXPR Lcom/intellij/psi/tree/IElementType;
+	public static final field BIND_EXPR_REAL Lcom/intellij/psi/tree/IElementType;

+	public fun visitBindExprReal (Lapp/softwork/sqldelight/db2dialect/grammar/psi/Db2BindExprReal;)V
 
+public class app/softwork/sqldelight/db2dialect/grammar/psi/impl/Db2BindExprRealImpl : com/alecstrong/sql/psi/core/psi/impl/SqlBindExprImpl, app/softwork/sqldelight/db2dialect/grammar/psi/Db2BindExprReal {
+	public fun <init> (Lcom/intellij/lang/ASTNode;)V
+	public fun accept (Lapp/softwork/sqldelight/db2dialect/grammar/psi/Db2Visitor;)V
+	public fun accept (Lcom/intellij/psi/PsiElementVisitor;)V
+}
+

Workaround: Move the comment into the rule

select_into_clause ::= INTO host_variable ( COMMA host_variable ) * {
  // https://www.ibm.com/docs/en/i/7.1?topic=statements-select-into
  pin = 1
}