title: -bash export : not a valid identifier
body: <p>I've recently edited some line in my /.bash_profile on my MacBook to add firebase to my school project.</p>
  <p>I used <code>echo export PATH=&quot;$PATH:/Users/quanan/Downloads/flutter/bin&quot;</code> but it did not work as I wanted(it did add in ~/.bash_profile) so i deleted it using <code>sed $d ~/.bash_profile</code> and checked with <code>cat ~/.bash_profile</code>. And then I saw it did not change anything (or it did but I did not know), i ran the sed command for a few times and checked with cat and terminal still displayed the same code.</p>
  <p>However, after those changes, whenever I start terminal, it will always display these 2 lines:</p>
  <pre><code>bash: export: `Fusion.app/Contents/Public:/usr/local/share/dotnet:~/.dotnet/tools:/Library/Frameworks/Mono.framework/Versions/Current/Commands:/Users/quanan/Downloads/flutter/bin:/Users/quanan/Downloads/flutter/.pub-cache/bin': not a valid identifier
  
  bash: export: `Fusion.app/Contents/Public:/usr/local/share/dotnet:~/.dotnet/tools:/Library/Frameworks/Mono.framework/Versions/Current/Commands:/Users/quanan/Downloads/flutter/bin:/Users/quanan/Downloads/flutter/.pub-cache/bin': not a valid identifier
  </code></pre>
  <p>Here is my ~/.bash_profile</p>
  <pre><code># Setting PATH for Python 3.7
  # The original version is saved in .bash_profile.pysave`
  PATH=&quot;/Library/Frameworks/Python.framework/Versions/3.7/bin&quot;
  export PATH=/Library/Frameworks/Python.framework/Versions/3.7/bin:/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin:/Applications/VMware Fusion.app/Contents/Public:/usr/local/share/dotnet:~/.dotnet/tools:/Library/Frameworks/Mono.framework/Versions/Current/Commands:/Users/quanan/Downloads/flutter/bin:/Users/quanan/Downloads/flutter/.pub-cache/bin
  export PATH=/Library/Frameworks/Python.framework/Versions/3.7/bin:/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin:/Applications/VMware Fusion.app/Contents/Public:/usr/local/share/dotnet:~/.dotnet/tools:/Library/Frameworks/Mono.framework/Versions/Current/Commands:/Users/quanan/Downloads/flutter/bin:/Users/quanan/Downloads/flutter/.pub-cache/bin
  export PATH=&quot;$PATH:/Users/quanan/Downloads/flutter/bin&quot;
  </code></pre>
  <p>I have checked this <a href="https://superuser.com/questions/881261/terminal-new-window-always-shows-bash-searching-command-not-found">Link</a> with similar errors and they say to comment the error lines but when I comment the 2 lines, terminal cannot run some basic commands like cat, mv or nano.</p>
  <p>So i have some questions about the error.</p>
  <ol>
  <li>How does this error affect anything on my system? (although my app is still running fine)</li>
  <li>Is it bad for my laptop? And how can I solve the error?</li>
  <li>(Out of topic) Why does it has to relate to python? Is it because of Python IDLE that i installed it before?</li>
  </ol>