Update Mercure Specification

Mercure-Specification.md

@@ -19,34 +19,41 @@ NOT**, **SHOULD**, **SHOULD NOT**, **RECOMMENDED**, **MAY**, and
 **OPTIONAL**, when they appear in this document, are to be interpreted
 as described in [(RFC2119)](https://tools.ietf.org/html/rfc2119).
 
-  - Topic: The unit to which one can subscribe to changes. The topic
+Topic
+: The unit to which one can subscribe to changes. The topic
     **SHOULD** be identified by an IRI
     [(RFC3987)](https://tools.ietf.org/html/rfc3987). Using an HTTPS
     [(RFC7230)](https://tools.ietf.org/html/rfc7230) or HTTP
     [(RFC7230)](https://tools.ietf.org/html/rfc7230) URI
     [(RFC3986)](https://tools.ietf.org/html/rfc3986) is **RECOMMENDED**.
 
-  - Update: The message containing the updated version of the topic. An
+Update
+: The message containing the updated version of the topic. An
     update can be marked as private, consequently, it must be dispatched
     only to subscribers allowed to receive it.
 
-  - Topic selector: An expression matching one or several topics.
+Topic selector
+: An expression matching one or several topics.
 
-  - Publisher: An owner of a topic. Notifies the hub when the topic feed
+Publisher
+: An owner of a topic. Notifies the hub when the topic feed
     has been updated. As in almost all pubsub systems, the publisher is
     unaware of the subscribers, if any. Other pubsub systems might call
     the publisher the "source". Typically a site or a web API, but can
     also be a web browser.
 
-  - Subscriber: A client application that subscribes to real-time
+Subscriber
+: A client application that subscribes to real-time
     updates of topics using topic selectors. Typically a web or a mobile
     application, but can also be a server.
 
-  - Subscription: A topic selector used by a subscriber to receive
+Subscription
+: A topic selector used by a subscriber to receive
     updates. A single subscriber can have several subscriptions, when it
     provides several topic selectors.
 
-  - Hub: A server that handles subscription requests and distributes the
+Hub
+: A server that handles subscription requests and distributes the
     content to subscribers when the corresponding topics have been
     updated. Any hub **MAY** implement its own policies on who can use
     it.