update sluggable.mb
update sluggable.mb

A comma was missing in the second example of RelativeSlugHandler
l3pp4rd/DoctrineExtensions,marc-j/DoctrineExtensions,edigu/DoctrineExtensions,eliberty/DoctrineExtensions,teohhanhui/DoctrineExtensions,notrix/DoctrineExtensions,Viburnum/DoctrineExtensions,gadelkareem/DoctrineExtensions,lengpiseth/DoctrineExtensions,nirav-programmer/DoctrineExtensions,CiscoVE/DoctrineExtensions,aplysie/DoctrineExtensions,jmcclell/DoctrineExtensions,bocharsky-bw/DoctrineExtensions,hhjcz/DoctrineExtensions,Engerim/DoctrineExtensions,lafourchette/DoctrineExtensions,tomazahlin/DoctrineExtensions,jeroendesloovere/DoctrineExtensions,aramalipoor/DoctrineExtensions,pmishev/DoctrineExtensions,cmfcmf/DoctrineExtensions,Padam87/DoctrineExtensions,Preis24/DoctrineExtensions,anesse/DoctrineExtensions,sroze/DoctrineExtensions,akd3vs/DoctrineExtensions,birko/DoctrineExtensions,mablae/DoctrineExtensions,blazarecki/DoctrineExtensions,SocialbitGmbH/DoctrineExtensions,rubenrua/DoctrineExtensions