Last modified: 2014-02-07 19:02:25 UTC
In both named and unnamed parameters. The unnamed one should be of course a bug. Should we manage to protect named ones from being trimmed in PHP parser? ie. generate ({{P1|1= hello <nowiki/>}}) to protect the trailing space?
This was fixed some time ago in the clean-up re-write of the transclusion dialog; sorry for the slow triage.