fix: Removed trailing space in getEntityLabel (BB-601)

[BharatKalluri]

Problem

Remove trailing space so that selections will not contain a space at the end

Solution

Currently getLabelEntity adds a space at the end. Looks like Label is always followed by disambiguation and getEntityDisambiguation already prefixes a space. So this should not be a problem :)

Areas of Impact

Text selection in title will be easier

[coveralls]

Coverage remained the same at 60.935% when pulling b51af41 on BharatKalluri:fix/remove_trailing_space_get_entity into c908c21 on bookbrainz:master.

[MonkeyDo]

I had a look in the codebase, and it looks like indeed this trailing space can be removed without ill effects, and fixes the tickets.
Thanks !