title: svn: Error parsing svn:externals property on '.'
body: <p>If I do </p>
  
  <p>svn propset svn:externals 'https://url.to.remote.branch' .</p>
  
  <p>svn: Error parsing svn:externals property on '.' : 'https://url.to.remote.branch'</p>
  
  <p>If I do</p>
  
  <p>svn propedit svn:externals 'https://url.to.remote.branch' .</p>
  
  <p>::vi - enter message::</p>
  
  <p>svn: Error parsing svn:externals property on 'https://url.to.remote.branch': 'message'</p>
  
  <p>Any ideas?  I haven't been able to google/find the instance of this problem happening on '.'</p>