enable deferred translation for the relationship calculator

git-svn-id: svn+ssh://svn.code.sf.net/p/gramps/code/trunk@22195 4ae1f11a-8b86-4847-b8af-ab372f36d1fd
enable translated output for this report

git-svn-id: svn+ssh://svn.code.sf.net/p/gramps/code/trunk@22197 4ae1f11a-8b86-4847-b8af-ab372f36d1fd
"_ngettext" is no longer used as a gramps translation keyword

git-svn-id: svn+ssh://svn.code.sf.net/p/gramps/code/trunk@22199 4ae1f11a-8b86-4847-b8af-ab372f36d1fd
better PEP-0008 (trans_text_ ==> trans_text)

PEP-0008 reserves the use of a trailing underscore for names
which conflict with Python keywords, which this doesn't.

The goal is to have a permanent name which is unique across
the gramps namespace, since it is defined (in po/genpot.sh
and po/update_po.py) as a keyword to flag strings to be put
into the translation "catalog" file (gramps.pot).

The new keyword "trans_text" is still unique.  (Also "_T_".)


git-svn-id: svn+ssh://svn.code.sf.net/p/gramps/code/trunk@22201 4ae1f11a-8b86-4847-b8af-ab372f36d1fd