Update app.py

app.py

@@ -176,11 +176,10 @@ with col6:
 
 # 🧜‍♀️ Displaying the Mermaid diagram for Diagram 3
 st.markdown("#### Diagram 3:")
-st.markdown('''
-```mermaid
-{mermaid_code3}
-```
-            '''
+
+mermaidblock="```mermaid"
+mermaidblockend="```"
+st.markdown(mermaidblock + mermaid_code3 + mermaidblockend)
 
 # 🏗️ Introducing Specific Knowledge Graphs.
 st.markdown("# V. Specific Knowledge Graphs")