ci: add markdown linter (#146)

spec/reactors/state_sync/reactor.md

@@ -5,14 +5,14 @@ and restoring state machine snapshots. For more information, see the [state sync
 
 The state sync reactor has two main responsibilites:
 
-* Serving state machine snapshots taken by the local ABCI application to new nodes joining the 
+* Serving state machine snapshots taken by the local ABCI application to new nodes joining the
   network.
 
 * Discovering existing snapshots and fetching snapshot chunks for an empty local application
   being bootstrapped.
 
 The state sync process for bootstrapping a new node is described in detail in the section linked
-above. While technically part of the reactor (see `statesync/syncer.go` and related components), 
+above. While technically part of the reactor (see `statesync/syncer.go` and related components),
 this document will only cover the P2P reactor component.
 
 For details on the ABCI methods and data types, see the [ABCI documentation](../../abci/abci.md).
@@ -26,16 +26,16 @@ available snapshots:
 type snapshotsRequestMessage struct{}
 ```
 
-The receiver will query the local ABCI application via `ListSnapshots`, and send a message 
+The receiver will query the local ABCI application via `ListSnapshots`, and send a message
 containing snapshot metadata (limited to 4 MB) for each of the 10 most recent snapshots:
 
 ```go
 type snapshotsResponseMessage struct {
-	Height   uint64
-	Format   uint32
-	Chunks   uint32
-	Hash     []byte
-	Metadata []byte
+ Height   uint64
+ Format   uint32
+ Chunks   uint32
+ Hash     []byte
+ Metadata []byte
 }
 ```
 
@@ -45,9 +45,9 @@ is accepted, the state syncer will request snapshot chunks from appropriate peer
 
 ```go
 type chunkRequestMessage struct {
-	Height uint64
-	Format uint32
-	Index  uint32
+ Height uint64
+ Format uint32
+ Index  uint32
 }
 ```
 
@@ -56,16 +56,16 @@ and respond with it (limited to 16 MB):
 
 ```go
 type chunkResponseMessage struct {
-	Height  uint64
-	Format  uint32
-	Index   uint32
-	Chunk   []byte
-	Missing bool
+ Height  uint64
+ Format  uint32
+ Index   uint32
+ Chunk   []byte
+ Missing bool
 }
 ```
 
 Here, `Missing` is used to signify that the chunk was not found on the peer, since an empty
-chunk is a valid (although unlikely) response. 
+chunk is a valid (although unlikely) response.
 
 The returned chunk is given to the ABCI application via `ApplySnapshotChunk` until the snapshot
 is restored. If a chunk response is not returned within some time, it will be re-requested,
@@ -73,5 +73,5 @@ possibly from a different peer.
 
 The ABCI application is able to request peer bans and chunk refetching as part of the ABCI protocol.
 
-If no state sync is in progress (i.e. during normal operation), any unsolicited response messages 
-are discarded.
+If no state sync is in progress (i.e. during normal operation), any unsolicited response messages
+are discarded.