Fix whitespace-insensitive hooks test on Windows

Author: seanwessmith

internal/hooks/installer_test.go

@@ -1,6 +1,7 @@
 package hooks
 
 import (
+	"encoding/json"
 	"os"
 	"path/filepath"
 	"runtime"
@@ -230,8 +231,16 @@ func TestSyncForRole_JSONWhitespaceInsensitive(t *testing.T) {
 		t.Fatalf("reading created file: %v", err)
 	}
 
-	// Add extra whitespace — structurally identical JSON, different bytes
-	reformatted := strings.ReplaceAll(string(original), ":", " : ")
+	// Reformat with different whitespace while preserving valid JSON.
+	var doc any
+	if err := json.Unmarshal(original, &doc); err != nil {
+		t.Fatalf("unmarshal original JSON: %v", err)
+	}
+	reformattedBytes, err := json.MarshalIndent(doc, "", "  ")
+	if err != nil {
+		t.Fatalf("marshal reformatted JSON: %v", err)
+	}
+	reformatted := string(reformattedBytes) + "\n"
 	if string(original) == reformatted {
 		t.Fatal("reformatted content should differ from original bytes")
 	}