Fix nested array literal format for arrays with negative numbers

Updated containsNonLiteralExpressions to accept unary minus of
literals (negative numbers) as literal-like expressions. This allows
nested arrays containing negative numbers to be formatted as
Literal Array_[Array_[...], ...] instead of Function array.

Author: claude

internal/explain/expressions.go

@@ -228,9 +228,16 @@ func containsOnlyArraysOrTuples(exprs []ast.Expression) bool {
 // any non-literal expressions (identifiers, function calls, etc.)
 func containsNonLiteralExpressions(exprs []ast.Expression) bool {
 	for _, e := range exprs {
-		if _, ok := e.(*ast.Literal); !ok {
-			return true
+		if _, ok := e.(*ast.Literal); ok {
+			continue
+		}
+		// Unary minus of a literal (negative number) is also acceptable
+		if unary, ok := e.(*ast.UnaryExpr); ok && unary.Op == "-" {
+			if _, ok := unary.Operand.(*ast.Literal); ok {
+				continue
+			}
 		}
+		return true
 	}
 	return false
 }

parser/testdata/00529_orantius/metadata.json

@@ -1 +1 @@
-{"explain_todo":{"stmt5":true}}
+{}

parser/testdata/00556_array_intersect/metadata.json

@@ -1 +1 @@
-{"explain_todo":{"stmt12":true}}
+{}

parser/testdata/02041_test_fuzzy_alter/metadata.json

@@ -1,5 +1 @@
-{
-  "explain_todo": {
-    "stmt3": true
-  }
-}
+{}

parser/testdata/02523_array_shuffle/metadata.json

@@ -1,11 +1 @@
-{
-  "explain_todo": {
-    "stmt16": true,
-    "stmt17": true,
-    "stmt18": true,
-    "stmt39": true,
-    "stmt40": true,
-    "stmt60": true,
-    "stmt61": true
-  }
-}
+{}

parser/testdata/02832_integer_type_inference/metadata.json

@@ -1 +1 @@
-{"explain_todo":{"stmt3":true,"stmt4":true}}
+{}

parser/testdata/02888_integer_type_inference_in_if_function/metadata.json

@@ -1 +1 @@
-{"explain_todo":{"stmt10":true,"stmt11":true,"stmt12":true,"stmt9":true}}
+{}