Stateres v2: Use bold to introduce definitions.

Otherwise they are inline into the paragraph without punctuation, and
hard to read.

I'm guessing that pandoc did a poor job of converting a LaTeX
`begin{description}...\end{description}` or `\paragraph{...} ...` to
Markdown.

content/rooms/fragments/v2-state-res.md

@@ -23,21 +23,21 @@ The state resolution algorithm for version 2 rooms uses the following
 definitions, given the set of room states
 {*S*<sub>1</sub>, *S*<sub>2</sub>, …}:
 
-Power events
+**Power events.**
 A *power event* is a state event with type `m.room.power_levels` or
 `m.room.join_rules`, or a state event with type `m.room.member` where
 the `membership` is `leave` or `ban` and the `sender` does not match the
 `state_key`. The idea behind this is that power events are events that
 might remove someone's ability to do something in the room.
 
-Unconflicted state map and conflicted state set
+**Unconflicted state map and conflicted state set.**
 The *unconflicted state map* is the state where the value of each key
 exists and is the same in each state *S*<sub>*i*</sub>. The *conflicted
 state set* is the set of all other state events. Note that the
 unconflicted state map only has one event per `(event_type, state_key)`,
 whereas the conflicted state set may have multiple events.
 
-Auth difference
+**Auth difference.**
 The *auth difference* is calculated by first calculating the full auth
 chain for each state *S*<sub>*i*</sub>, that is the union of the auth
 chains for each event in *S*<sub>*i*</sub>, and then taking every event
@@ -45,11 +45,11 @@ that doesn't appear in every auth chain. If *C*<sub>*i*</sub> is the
 full auth chain of *S*<sub>*i*</sub>, then the auth difference is
  ∪ *C*<sub>*i*</sub> −  ∩ *C*<sub>*i*</sub>.
 
-Full conflicted set
+**Full conflicted set.**
 The *full conflicted set* is the union of the conflicted state set and
 the auth difference.
 
-Reverse topological power ordering
+**Reverse topological power ordering.**
 The *reverse topological power ordering* of a set of events is the
 lexicographically smallest topological ordering based on the DAG formed
 by auth events. The reverse topological power ordering is ordered from
@@ -71,7 +71,7 @@ events using Kahn's algorithm for topological sorting, and at each step
 selecting, among all the candidate vertices, the smallest vertex using
 the above comparison relation.
 
-Mainline ordering
+**Mainline ordering.**
 Given an `m.room.power_levels` event *P*, the *mainline of* *P* is the
 list of events generated by starting with *P* and recursively taking the
 `m.room.power_levels` events from the `auth_events`, ordered such that
@@ -96,7 +96,7 @@ events: for events *x* and *y*, *x* &lt; *y* if
     same `origin_server_ts`, but *x*'s `event_id` is *less* than *y*'s
     `event_id`.
 
-Iterative auth checks
+**Iterative auth checks.**
 The *iterative auth checks algorithm* takes as input an initial room
 state and a sorted list of state events, and constructs a new room state
 by iterating through the event list and applying the state event to the