cleanup comments and typos

Author: SurfingNerd

crates/ethcore/sync/src/chain/propagator.rs

@@ -385,7 +385,7 @@ impl ChainSync {
         let peers = self.get_consensus_peers();
         trace!(target: "sync", "Sending proposed blocks to {:?}", peers);
         for block in proposed {
-            // todo: sometimes we get at the receiving end blocks, with mismatching total difficulty,
+            // todo: sometimes we get at the receiving end blocks, with mismatched total difficulty,
             // so we ignore those blocks on import.
             // might that be the case if we are sending more than 1 block here ?
             // more about: https://github.com/DMDcoin/diamond-node/issues/61

crates/net/network-devp2p/src/session_container.rs

@@ -418,7 +418,6 @@ impl SessionContainer {
                     }
                 } else {
                     trace!(target: "network", "No session active for {node_id} with peer id {existing_peer_id}");
-                    // todo: make sure the mapping is rewritten.
                 }
 
                 trace!(target: "network", "Session {peer_id} has a duplicate :{existing_peer_id} {node_id}");