title: MacOS(Catalina) terminal bash looks weird
body: <p><a href="https://i.stack.imgur.com/mSEFc.png" rel="nofollow noreferrer">enter image description here</a></p>
  
  <p>I just have installed Catalina on my imac, and I saw a terminal bash looks weird.
  It should be ~$ but my terminal shows ~% 
  Can anyone change this uncommon line(~%) to a normal line(~$)?
  Thank you in advance </p>