title: Django makemessages is marking translated strings as fuzzy
body: <p>I am having issues with the Django makemessages management command. It seems like it is randomly marking messages as fuzzy in the .po file even though they have already been translated. For example....</p>
  
  <pre><code>#: templates/profile/edit.html:21
  msgid "Save Changes"
  msgstr "Save Changes DE"
  </code></pre>
  
  <p>Would become...</p>
  
  <pre><code>#: templates/profile/edit.html:21
  #, fuzzy,
  msgid "Save Changes"
  msgstr "Save Changes DE"
  </code></pre>
  
  <p>The behaviour is very intermittent and hard to recreate, so debugging hasn't been straightforward.</p>
  
  <p>Does anyone have any ideas?</p>