Removed ridiculous extra space around the title in docs/topics/db/aggregation.txt
Removed ridiculous extra space around the title in docs/topics/db/aggregation.txt

git-svn-id: 4f9f921b081c523744c7bf24d959a0db39629563@12121 bcc190cf-cafb-0310-a4f2-bffc1f526a37

disqus/django-old,django-nonrel/django-nonrel,Smarsh/django,sam-tsai/django-old,mitsuhiko/django,mitsuhiko/django,Smarsh/django,Smarsh/django,skevy/django,Instagram/django,bfirsh/django-old,mitsuhiko/django,Instagram/django,skevy/django,Smarsh/django,jamespacileo/django-france,alex/django-old,bfirsh/django-old,disqus/django-old,alex/django-old,jamespacileo/django-france,Instagram/django,skevy/django,alex/django-old,bfirsh/django-old,sam-tsai/django-old,sam-tsai/django-old,sam-tsai/django-old,disqus/django-old,jamespacileo/django-france,django-nonrel/django-nonrel,django-nonrel/django-nonrel