docs: unneeded line breaks

single line looks ok under the new style

(cherry picked from commit a371653c0b1c3fca5f0d69dcd6033e74a57f5433)

git-svn-id: https://svn.apache.org/repos/asf/cayenne/main/branches/STABLE-3.1@1446264 13f79535-47bb-0310-9956-ffa450edef68
docs: queries > EJBQLQuery, finishing SelectQuery, SQLTemplate

(cherry picked from commit 728b7974b40971b784867f7e52edb5bba539cf31)

git-svn-id: https://svn.apache.org/repos/asf/cayenne/main/branches/STABLE-3.1@1446265 13f79535-47bb-0310-9956-ffa450edef68