remove ability to predict on empty text with button

app.py

@@ -27,7 +27,7 @@ with st.spinner("Loading model..."):
 text = st.text_area('Enter text here:')
 submit = st.button('Predict')
 
-if submit or len(text) > 0:
+if (submit and len(text.strip()) > 0) or len(text.strip()) > 0:
 
     prediction = pipe(text)[0]
     prediction = sort_predictions(prediction)