support diagram plotting via mermaid !

tests/test_markdown.py

@@ -14,10 +14,24 @@ for filename in os.listdir(directory):
 ```
 
 Replace 'Tex/' with the actual directory path where your files are located before running the script.
-
-
 """
 
+
+md = """
+Following code including wrapper
+
+```mermaid
+graph TD
+    A[Enter Chart Definition] --> B(Preview)
+    B --> C{decide}
+    C --> D[Keep]
+    C --> E[Edit Definition]
+    E --> B
+    D --> F[Save Image and Code]
+    F --> B
+```
+
+"""
 def validate_path():
     import os, sys