title: pip freeze doesn't show package version
body: <p>Over the weekends I have upgraded my Ubuntu to 20.04, and I tried creating virtualenvironment with python 3.8.2, and pip install <code>requirements.txt</code>.
  In requirement.txt, I am installing some code from private gitlab repositories. </p>
  
  <p>Previously, if I do <code>pip freeze</code>, I was able to see all packages name and version (formatted as <code>package_name == version</code>.</p>
  
  <p>However, if I do <code>pip freeze</code>, now I see something like this...</p>
  
  <pre><code>pkg1 @ file:///tmp/tmp44ir_jik
  pkg2 @ file:///tmp/tmp5pijtzbq
  ...
  </code></pre>
  
  <p>(pkg1 and pkg2 are both from pip installing private git repo)</p>
  
  <p>I would like to somehow display the version, but don't know how to.</p>
  
  <p>I mean, <code>pip list</code> does show the version, but I am writing a script and would like to use <code>pip freeze</code> for it. 
  How can I get <code>pip freeze</code> to show how it use to before (with the format as <code>pkg_name==pkg_version</code>)?</p>
  
  <p>Thanks in advance.</p>