Fix documentation
Fix documentation

Some stylistic fixes here and there. Hopefully, this would make the
documentation a bit more clear.

floriansemm/SolrBundle,clarity-project/SolrBundle,clarity-project/SolrBundle,drdk/SolrBundle,zquintana/SunSearchBundle,floriansemm/SolrBundle,drdk/SolrBundle,zquintana/SunSearchBundle