datacite: clean abstracts, use unknown value tokens

Datacite defines placeholders for unknown values:

* https://support.datacite.org/docs/schema-values-unknown-information-v43

Clean abstracts.

1 files changed, 1 insertions, 1 deletions

diff --git a/python/tests/files/datacite/datacite_result_14.json b/python/tests/files/datacite/datacite_result_14.json
index 4521f891..c3719aeb 100644
--- a/python/tests/files/datacite/datacite_result_14.json
+++ b/python/tests/files/datacite/datacite_result_14.json
@@ -103,7 +103,7 @@
     "refs": [],
     "abstracts": [
         {
-            "content": "An entry from the Cambridge Structural Database, the world\u2019s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and quality measures.",
+            "content": "An entry from the Cambridge Structural Database, the world's repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and quality measures.",
             "mimetype": "text/plain",
             "lang": "en"
         }