Fixes rst error in Consumer docstring
Fixes rst error in Consumer docstring

urbn/kombu,romank0/kombu,depop/kombu,cce/kombu,daevaorn/kombu,disqus/kombu,cce/kombu,WoLpH/kombu,bmbouter/kombu,mathom/kombu,pantheon-systems/kombu,mverrilli/kombu,alex/kombu,romank0/kombu,mverrilli/kombu,numb3r3/kombu,alex/kombu,bmbouter/kombu,andresriancho/kombu,andresriancho/kombu,WoLpH/kombu,ZoranPavlovic/kombu,disqus/kombu,pantheon-systems/kombu,xujun10110/kombu,xujun10110/kombu,iris-edu-int/kombu,mathom/kombu,celery/kombu,Elastica/kombu,iris-edu-int/kombu,tkanemoto/kombu,numb3r3/kombu,jindongh/kombu,Elastica/kombu,depop/kombu,daevaorn/kombu,jindongh/kombu,ZoranPavlovic/kombu,tkanemoto/kombu