update comments (#1445)

runtime/polkadot/src/lib.rs

@@ -329,7 +329,7 @@ parameter_types! {
 	pub const SlashDeferDuration: staking::EraIndex = 28;
 	pub const RewardCurve: &'static PiecewiseLinear<'static> = &REWARD_CURVE;
 	pub const MaxNominatorRewardedPerValidator: u32 = 64;
-	// quarter of the last session will be for election.
+	// last 15 minutes of the last session will be for election.
 	pub const ElectionLookahead: BlockNumber = EPOCH_DURATION_IN_BLOCKS / 16;
 	pub const MaxIterations: u32 = 10;
 	pub MinSolutionScoreBump: Perbill = Perbill::from_rational_approximation(5u32, 10_000);
@@ -1107,8 +1107,7 @@ construct_runtime! {
 		ImOnline: im_online::{Module, Call, Storage, Event<T>, ValidateUnsigned, Config<T>},
 		AuthorityDiscovery: authority_discovery::{Module, Call, Config},
 
-		// Governance stuff; uncallable initially. Calls should be uncommented once we're ready to
-		// enable governance.
+		// Governance stuff.
 		Democracy: democracy::{Module, Call, Storage, Config, Event<T>},
 		Council: collective::<Instance1>::{Module, Call, Storage, Origin<T>, Event<T>, Config<T>},
 		TechnicalCommittee: collective::<Instance2>::{Module, Call, Storage, Origin<T>, Event<T>, Config<T>},