Issue/541

avoid result column duplication on "Special:Ask"

Reference: 1

SMW 2.4+

{{#ask: 
 [[:+]]
 [[Page author::+]]
 |?Has Url=url
 |format=table 
 |sort=Has Url
 |limit=2
 |mainlabel=page
}}

page	url
Issue/3533	[git:git.server.com/srv/git git:git.server.com/srv/git]
Lorem ipsum	http://example.org/some/
... autres résultats

"hack" for SMW 1.6 to 2.3

{{#ask: 
 [[:+]]
 [[Page author::+]]
 |?=page
 |?Has Url=url
 |format=table 
 |sort=Has Url
 |limit=2
 |mainlabel=-
}}

page	url
Issue/3533	[git:git.server.com/srv/git git:git.server.com/srv/git]
Lorem ipsum	http://example.org/some/
... autres résultats