cl-ast: Let Ty handle the complexities of VariantKind::Tuple's type list

cl-ast/src/ast_impl.rs

@@ -251,7 +251,7 @@ mod display {
             match self {
                 VariantKind::Plain => Ok(()),
                 VariantKind::CLike(n) => write!(f, " = {n}"),
-                VariantKind::Tuple(v) => delimit(separate(v, ", "), INLINE_PARENS)(f),
+                VariantKind::Tuple(v) => v.fmt(f),
                 VariantKind::Struct(v) => delimit(separate(v, ", "), INLINE_BRACES)(f),
             }
         }

cl-ast/src/lib.rs

@@ -197,7 +197,7 @@ pub struct Variant {
 pub enum VariantKind {
     Plain,
     CLike(u128),
-    Tuple(Vec<Ty>),
+    Tuple(Ty),
     Struct(Vec<StructMember>),
 }