Minor formatting changes for the extension guide
Minor formatting changes for the extension guide

liquidJbilling/LT-Jbilling-MsgQ-3.1,liquidJbilling/LT-Jbilling-MsgQ-3.1,liquidJbilling/LT-Jbilling-MsgQ-3.1,liquidJbilling/LT-Jbilling-MsgQ-3.1