title: Flutter commands do not work in terminal on Mac OS after update
body: <p>I am running on a Mac, I downloaded Flutter through Git and can confirm that the files are all there, I also successfully updated my path in my ~/.zshrc file. This was all working fine until I ran <code>flutter upgrade</code>, after which the <code>flutter</code> command stopped working. I confirmed this by running <code>which flutter</code> and the output was:</p>
  <pre><code>/Users/aamir/development/flutter/bin/flutter
  </code></pre>
  <p>which looks correct. However, running <code>flutter</code> in my terminal gives me back this error:</p>
  <pre><code>: command not foundpment/flutter/bin/internal/shared.sh: line 5: 
  </code></pre>
  <p>Not sure what's the issue here</p>