Summary

Due to quote ` instead of a single quote in the code example, it throws an error.

Steps to reproduce

What are the steps we should take to reproduce the bug:

1. Go to Main Concepts page
2. Scroll down to Widgets section.
3. Copy the code for the square the number example and run using streamlit.

Expected behavior:

The code should have worked correctly in the interpreter.

Actual behavior:

Python throws syntax error due to wrong quote.

Is this a regression?

no

Debug info

• Streamlit version: 0.47.2
• Python version: 3.7
• Using Conda
• OS version: Linux Mint 18.3
• Browser version: Chrome