old_contents: from __future__ import unicode_literals
  
  from moto.compat import OrderedDict
  from .responses import S3ResponseInstance
  
  url_bases = [
      "https?://s3(.*).amazonaws.com",
      "https?://(?P<bucket_name>[a-zA-Z0-9\-_.]*)\.?s3(.*).amazonaws.com"
  ]
  
  url_paths = OrderedDict([
      # subdomain bucket
      ('{0}/$', S3ResponseInstance.bucket_response),
  
      # subdomain key of path-based bucket
      ('{0}/(?P<key_or_bucket_name>.+)', S3ResponseInstance.ambiguous_response),
  
      # path-based bucket + key
      ('{0}/(?P<bucket_name_path>[a-zA-Z0-9\-_./]+)/(?P<key_name>.+)', S3ResponseInstance.key_response),
  ])
  
new_contents: from __future__ import unicode_literals
  
  from .responses import S3ResponseInstance
  
  url_bases = [
      "https?://s3(.*).amazonaws.com",
      "https?://(?P<bucket_name>[a-zA-Z0-9\-_.]*)\.?s3(.*).amazonaws.com"
  ]
  
  url_paths = {
      # subdomain bucket
      '{0}/$': S3ResponseInstance.bucket_response,
  
      # subdomain key of path-based bucket
      '{0}/(?P<key_or_bucket_name>[^/]+)/?$': S3ResponseInstance.ambiguous_response,
  
      # path-based bucket + key
      '{0}/(?P<bucket_name_path>[a-zA-Z0-9\-_./]+)/(?P<key_name>.+)': S3ResponseInstance.key_response,
  }
  
subject: Fix s3 url regex to ensure path-based bucket and key does not catch.