Add testing for (un)distinguish.
Add testing for (un)distinguish.

After http://redd.it/19ak1b distinguished is now a attribute,
and (un)distinguish can be tested,

tehp/reddit,darthkedrik/praw,praw-dev/praw,leviroth/praw,voussoir/reddit,nmtake/praw,iAmMrinal0/reddit,13steinj/praw,tehp/reddit,tehp/reddit,praw-dev/praw,voussoir/reddit,darthkedrik/praw,TacticalGoat/reddit,leviroth/praw,RGood/praw,nmtake/praw,iAmMrinal0/reddit,13steinj/praw,gschizas/praw,TacticalGoat/reddit,gschizas/praw,RGood/praw