diff --git a/beacon_chain/attestation_aggregation.nim b/beacon_chain/attestation_aggregation.nim
index 060fe9308..c9801642a 100644
--- a/beacon_chain/attestation_aggregation.nim
+++ b/beacon_chain/attestation_aggregation.nim
@@ -40,7 +40,7 @@ func get_slot_signature(state: BeaconState, slot: Slot, privkey: ValidatorPrivKe
     get_domain(state, DOMAIN_BEACON_ATTESTER, compute_epoch_at_slot(slot))
   bls_sign(privkey, hash_tree_root(slot).data, domain)
 
-# https://github.com/ethereum/eth2.0-specs/blob/v0.9.4/specs/validator/0_beacon-chain-validator.md#aggregation-selection
+# https://github.com/ethereum/eth2.0-specs/blob/v0.10.1/specs/phase0/validator.md#aggregation-selection
 func is_aggregator(state: BeaconState, slot: Slot, index: uint64,
     slot_signature: ValidatorSig): bool =
   # TODO index is a CommitteeIndex, aka uint64
@@ -65,17 +65,17 @@ proc aggregate_attestations*(
   doAssert slot + ATTESTATION_PROPAGATION_SLOT_RANGE >= state.slot
   doAssert state.slot >= slot
 
-  # https://github.com/ethereum/eth2.0-specs/blob/v0.9.4/specs/validator/0_beacon-chain-validator.md#aggregation-selection
+  # https://github.com/ethereum/eth2.0-specs/blob/v0.10.1/specs/phase0/validator.md#aggregation-selection
   if not is_aggregator(state, slot, index, slot_signature):
     return none(AggregateAndProof)
 
   let attestation_data =
     makeAttestationData(state, slot, index, get_block_root_at_slot(state, slot))
 
-  # https://github.com/ethereum/eth2.0-specs/blob/v0.10.0/specs/phase0/validator.md#construct-aggregate
+  # https://github.com/ethereum/eth2.0-specs/blob/v0.10.1/specs/phase0/validator.md#construct-aggregate
   for attestation in getAttestationsForBlock(pool, state, slot):
     if attestation.data == attestation_data:
-      # https://github.com/ethereum/eth2.0-specs/blob/v0.10.0/specs/phase0/validator.md#aggregateandproof
+      # https://github.com/ethereum/eth2.0-specs/blob/v0.10.1/specs/phase0/validator.md#aggregateandproof
       return some(AggregateAndProof(
         aggregator_index: index,
         aggregate: attestation,
diff --git a/beacon_chain/inspector.nim b/beacon_chain/inspector.nim
index 548801812..f65ee7cd7 100644
--- a/beacon_chain/inspector.nim
+++ b/beacon_chain/inspector.nim
@@ -93,7 +93,7 @@ type
       abbr: "d"
       defaultValue: false }: bool
 
-func getTopic(filter: TopicFilter): seq[string] {.inline.} =
+func getTopics(filter: TopicFilter): seq[string] {.inline.} =
   case filter
   of TopicFilter.Blocks:
     @[topicBeaconBlocks]
@@ -106,7 +106,7 @@ func getTopic(filter: TopicFilter): seq[string] {.inline.} =
   of TopicFilter.AttesterSlashings:
     @[topicAttesterSlashings]
 
-proc getPeerId(peer: PeerID, conf: InspectorConf): string {.inline.} =
+func getPeerId(peer: PeerID, conf: InspectorConf): string {.inline.} =
   if conf.fullPeerId:
     result = peer.pretty()
   else:
@@ -278,8 +278,7 @@ proc run(conf: InspectorConf) {.async.} =
 
   try:
     for filter in topics:
-      let topics = getTopic(filter)
-      for topic in topics:
+      for topic in getTopics(filter):
         let t = await api.pubsubSubscribe(topic, pubsubLogger)
         info "Subscribed to topic", topic = topic
         subs.add((ticket: t, future: t.transp.join()))
diff --git a/beacon_chain/spec/datatypes.nim b/beacon_chain/spec/datatypes.nim
index 4748eab6d..956e30399 100644
--- a/beacon_chain/spec/datatypes.nim
+++ b/beacon_chain/spec/datatypes.nim
@@ -59,7 +59,6 @@ else:
 const
   SPEC_VERSION* = "0.10.1" ## \
   ## Spec version we're aiming to be compatible with, right now
-  ## TODO: improve this scheme once we can negotiate versions in protocol
 
   GENESIS_EPOCH* = (GENESIS_SLOT.uint64 div SLOTS_PER_EPOCH).Epoch ##\
   ## compute_epoch_at_slot(GENESIS_SLOT)