update readme example

Author: Jimmy228676

README.md

@@ -13,16 +13,30 @@ ArborParser is a powerful Python library designed to parse structured text docum
 
 Given a text document with headings, ArborParser can parse and structure it as follows:
 
+### Original Text
+```
+Chapter 1 Animals
+1.1 Mammals
+1.1.1 Primates
+1.2 Reptiles
+1.2.2 Crocodiles
+1.3 Birds
+1.3.1 Parrots
+1.3.2 Pigeons
+Chapter 2 Plants
+2.1 Angiosperms
+2.1.1 Dicotyledons
+2.1.2 Monocotyledons
+```
+
 ### Chain Structure
 
 ```
 LEVEL-[1]: Animals
 LEVEL-[1, 1]: Mammals
 LEVEL-[1, 1, 1]: Primates
 LEVEL-[1, 2]: Reptiles
-LEVEL-[1, 3, 3]: Snakes # wrong
-LEVEL-[1, 2, 2]: Crocodiles # hopefully inserted to the upper nearest 1.2
-LEVEL-[1, 2]: wrong 1.2 # create a new level as a child of 1
+LEVEL-[1, 2, 2]: Crocodiles
 LEVEL-[1, 3]: Birds
 LEVEL-[1, 3, 1]: Parrots
 LEVEL-[1, 3, 2]: Pigeons
@@ -40,9 +54,7 @@ ROOT
 │   ├─ 1.1 Mammals
 │   │   └─ 1.1.1 Primates
 │   ├─ 1.2 Reptiles
-│   │   └─ 1.2.2 Crocodiles # hopefully inserted to the upper nearest 1.2
-│   ├─ 1.3.3 Snakes # wrong
-│   ├─ 1.2 wrong 1.2 # create a new level as a child of 1
+│   │   └─ 1.2.2 Crocodiles
 │   └─ 1.3 Birds
 │       ├─ 1.3.1 Parrots
 │       └─ 1.3.2 Pigeons