[pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

examples/boltzmann_wealth_model/Readme.md

@@ -34,10 +34,10 @@ If your browser doesn't open automatically, point it to [http://127.0.0.1:8765/]
 
 ## Optional
 
-An optional visualization is also provided using Streamlit, which is another popular Python library for creating interactive web applications. 
+An optional visualization is also provided using Streamlit, which is another popular Python library for creating interactive web applications.
 
 To run the Streamlit app, you will need to install the `streamlit` and `altair` libraries:
-    
+
 ```
     $ pip install streamlit altair
 ```