fix nested expander

app.py

@@ -154,10 +154,10 @@ def main():
         figure = go.Figure(data=[scatter, scatter_tip, scatter_tip_lines], layout=layout)
         figure.update_layout(paper_bgcolor="#FFFFFF", plot_bgcolor='#FFFFFF', showlegend=False)
         st.plotly_chart(figure, use_container_width=True)
-        with st.expander("What is it?"):
-            st.write("""
-                Text generation with an external classifier requires a huge amount of computation. Therefore text generating with CAIF could be slow. To overcome this issue, we can apply reweighting not for every step. Our hypothesis is that we can run reweighting only if entropy of the next token is above certain threshold. This strategy will reduce the amont of computation. Note that if entropy threshold is too high, we don't get desired attribute in generated text
-            """)
+        st.subheader("What is it?")
+        st.write("""
+            Text generation with an external classifier requires a huge amount of computation. Therefore text generating with CAIF could be slow. To overcome this issue, we can apply reweighting not for every step. Our hypothesis is that we can run reweighting only if entropy of the next token is above certain threshold. This strategy will reduce the amont of computation. Note that if entropy threshold is too high, we don't get desired attribute in generated text
+        """)
         fp16 = st.checkbox("FP16", value=True)
     st.session_state["generated_text"] = None
     if "sst" in cls_model_name: