Last modified: 2012-11-29 12:40:06 UTC
See for example http://wikidata-test-repo.wikimedia.de/wiki/Special:ItemByTitle/hewiki/FOO_BAR The part of the page title after the space (=BAR) is added as text in the external link, and is not part of the link URL.
Something else, the form should probably use GET instead of POST.
https://gerrit.wikimedia.org/r/#/c/21052/
*** Bug 41576 has been marked as a duplicate of this bug. ***
Verified in Wikidata demo time for sprint 14