Always percentage encode data URIs

Change-Id: I1f41f6bc15acb54d5e8d695304ce11120c950e06
diff --git a/t/real/wpf.t b/t/real/wpf.t
index e44e0ba..a7b07e5 100644
--- a/t/real/wpf.t
+++ b/t/real/wpf.t
@@ -47,7 +47,7 @@
 ok(!$meta->{T_corpus_sub_title}, 'Correct Corpus Sub title');
 
 # This link is broken, but that's due to the data
-is($meta->{A_externalLink}, 'data:application/x.korap-link;title=Wikipedia,http://fr.wikipedia.org/wiki/Psychanalyse', 'No link');
+is($meta->{A_externalLink}, 'data:application/x.korap-link;title=Wikipedia,http%3A%2F%2Ffr.wikipedia.org%2Fwiki%2FPsychanalyse', 'No link');
 
 # Tokenization
 use_ok('KorAP::XML::Tokenizer');