Merge upstream.

diff --cc test/test_manifest.json
index 813fc272b2db1d7c22d0b50a7b076fcec6b969fc,8e8098317fb50041c41b048afd9c222432866c9e..aab83880758a6caa395afb4bfbd2c4b4ec3203e6
--- 1/test/test_manifest.json
--- 2/test/test_manifest.json
+++ b/test/test_manifest.json
@@@ -341,12 -341,12 +341,19 @@@
         "pageLimit": 3,
         "type": "eq"
      },
-     {
-       "id": "aboutstacks",
+     {  "id": "issue919",
+        "file": "pdfs/issue919.pdf",
+        "md5": "3a1716a512aca4d7a8d6106bd4885d14",
+        "rounds": 1,
+        "link": true,
+        "pageLimit": 3,
+        "type": "eq"
++    },
++    {  "id": "aboutstacks",
 +      "file": "pdfs/aboutstacks.pdf",
 +      "md5": "6e7c8416a293ba2d83bc8dd20c6ccf51",
 +      "rounds": 1,
 +      "link": true,
 +      "type": "eq"
      }
  ]