Fix format text serialization, LineTrace node name

js/entity/FormatTextEntity.js

@@ -8,7 +8,7 @@ export default class FormatTextEntity extends IEntity {
     static lookbehind = "LOCGEN_FORMAT_NAMED"
     static attributes = {
         value: {
-            type: [new UnionType(LocalizedTextEntity, String, InvariantTextEntity, FormatTextEntity)],
+            type: [new UnionType(String, LocalizedTextEntity, InvariantTextEntity, FormatTextEntity)],
         },
     }
 
@@ -18,6 +18,20 @@ export default class FormatTextEntity extends IEntity {
 
     constructor(values) {
         super(values)
-        /** @type {String} */ this.value
+        /** @type {(String | LocalizedTextEntity | InvariantTextEntity | FormatTextEntity)[]} */ this.value
+    }
+
+    toString() {
+        const pattern = this.value?.[0]?.toString() // The pattern is always the first element of the array
+        if (!pattern) {
+            return ""
+        }
+        const values = this.value.slice(1).map(v => v.toString())
+        return pattern.replaceAll(/\{([a-zA-Z]\w*)\}/g, (substring, arg) => {
+            const argLocation = values.indexOf(arg) + 1
+            return argLocation > 0 && argLocation < values.length
+                ? values[argLocation]
+                : substring
+        })
     }
 }