Update app.py

app.py

@@ -109,20 +109,23 @@ st.write(
     "See more in our public [GitHub repository](https://github.com/streamlit/example-app-time-series-annotation)"
 )
 
-st.code(
-    f"""
+
 import altair as alt
 import pandas as pd
 import streamlit as st
 from vega_datasets import data
+
 @st.experimental_memo
 def get_data():
     source = data.stocks()
     source = source[source.date.gt("2004-01-01")]
     return source
 source = get_data()
+
 # Original time series chart. Omitted `get_chart` for clarity
+
 chart = get_chart(source)
+
 # Input annotations
 ANNOTATIONS = [
     ("Mar 01, 2008", "Pretty good day for GOOG"),
@@ -144,6 +147,7 @@ annotation_layer = (
     )
     .interactive()
 )
+
 # Display both charts together
 st.altair_chart((chart + annotation_layer).interactive(), use_container_width=True)
 """,