duplicated Unexpected error message

error.txt

  2) express-processimage when sharp is available should support rotate with a single argument for gm:
     
expected 'GET /bulb.gif?rotate=90' to yield response
{
  headers: { 'X-Express-Processimage': 'gm' },
  body: expect.it('to have metadata satisfying', { format: 'GIF', size: ... })
                .and('to resemble', '/home/andreas/work/express-processimage/testdata/rotatedBulb.gif')
}

GET /bulb.gif?rotate=90 HTTP/1.1

HTTP/1.1 200 OK
X-Powered-By: Express
Accept-Ranges: bytes
Cache-Control: public, max-age=0
Last-Modified: Wed, 09 Mar 2016 14:50:48 GMT
ETag: W/"5c8-1535bdbd940-processimage"
Content-Type: image/gif
X-Express-Processimage: gifsicle // should equal gm
                                 // -gifsicle
                                 // +gm
Date: Mon, 14 Mar 2016 09:09:18 GMT
Connection: keep-alive
Transfer-Encoding: chunked

Buffer[1498] (image/gif)
  UnexpectedError: 
  expected 'GET /bulb.gif?rotate=90' to yield response
  {
    headers: { 'X-Express-Processimage': 'gm' },
    body: expect.it('to have metadata satisfying', { format: 'GIF', size: ... })
                  .and('to resemble', 'testdata/rotatedBulb.gif')
  }
  
  GET /bulb.gif?rotate=90 HTTP/1.1
  
  HTTP/1.1 200 OK
  X-Powered-By: Express
  Accept-Ranges: bytes
  Cache-Control: public, max-age=0
  Last-Modified: Wed, 09 Mar 2016 14:50:48 GMT
  ETag: W/"5c8-1535bdbd940-processimage"
  Content-Type: image/gif
  X-Express-Processimage: gifsicle // should equal gm
                                   // -gifsicle
                                   // +gm
  Date: Mon, 14 Mar 2016 09:09:18 GMT
  Connection: keep-alive
  Transfer-Encoding: chunked
  
  Buffer[1498] (image/gif)
      at node_modules/unexpected/lib/createWrappedExpectProto.js:63:35
      at tryCatcher (node_modules/unexpected/node_modules/bluebird/js/main/util.js:26:23)
      at Promise._settlePromiseFromHandler (node_modules/unexpected/node_modules/bluebird/js/main/promise.js:503:31)
      at Promise._settlePromiseAt (node_modules/unexpected/node_modules/bluebird/js/main/promise.js:577:18)
      at Promise._settlePromises (node_modules/unexpected/node_modules/bluebird/js/main/promise.js:693:14)
      at Async._drainQueue (node_modules/unexpected/node_modules/bluebird/js/main/async.js:123:16)
      at Async._drainQueues (node_modules/unexpected/node_modules/bluebird/js/main/async.js:133:10)
      at Async.drainQueues (node_modules/unexpected/node_modules/bluebird/js/main/async.js:15:14)
      at node_modules/unexpected/lib/workQueue.js:8:13
      at Array.forEach (native)
      at Object.workQueue.drain (node_modules/unexpected/lib/workQueue.js:7:20)
      at node_modules/unexpected/lib/workQueue.js:17:19