diff --git a/cmd/miner/cpuminer.go b/cmd/miner/cpuminer.go
index 53f190f1..4d077538 100644
--- a/cmd/miner/cpuminer.go
+++ b/cmd/miner/cpuminer.go
@@ -1,5 +1,5 @@
 // Copyright (c) 2014-2016 The btcsuite developers
-// Copyright (c) 2015-2021 The Decred developers
+// Copyright (c) 2015-2023 The Decred developers
 // Use of this source code is governed by an ISC
 // license that can be found in the LICENSE file.
 
@@ -185,9 +185,9 @@ func (m *CPUMiner) solveBlock(ctx context.Context, headerB []byte, target *big.R
 	}
 }
 
-// solve is the main work horse of generateblocks. It attempts to solve
-// blocks while detecting when it is performing stale work. When a
-// a block is solved it is sent via the work channel.
+// solve is the main work horse of generateblocks. It attempts to solve blocks
+// while detecting when it is performing stale work. When a block is solved it
+// is sent via the work channel.
 func (m *CPUMiner) solve(ctx context.Context) {
 	for {
 		m.miner.workMtx.RLock()
diff --git a/gui/gui.go b/gui/gui.go
index 231009e3..aeeaee82 100644
--- a/gui/gui.go
+++ b/gui/gui.go
@@ -1,4 +1,4 @@
-// Copyright (c) 2020-2021 The Decred developers
+// Copyright (c) 2020-2023 The Decred developers
 // Use of this source code is governed by an ISC
 // license that can be found in the LICENSE file.
 
@@ -86,7 +86,7 @@ type Config struct {
 	FetchCacheChannel func() chan pool.CacheUpdateEvent
 }
 
-// GUI represents the the mining pool user interface.
+// GUI represents the mining pool user interface.
 type GUI struct {
 	cfg             *Config
 	limiter         *pool.RateLimiter
diff --git a/pool/chainstate.go b/pool/chainstate.go
index 26d4bca7..03ce5da4 100644
--- a/pool/chainstate.go
+++ b/pool/chainstate.go
@@ -1,4 +1,4 @@
-// Copyright (c) 2021 The Decred developers
+// Copyright (c) 2021-2023 The Decred developers
 // Use of this source code is governed by an ISC
 // license that can be found in the LICENSE file.
 
@@ -66,7 +66,7 @@ type ChainState struct {
 	currentWorkMtx sync.RWMutex
 }
 
-// NewChainState creates a a chain state.
+// NewChainState creates a chain state.
 func NewChainState(sCfg *ChainStateConfig) *ChainState {
 	return &ChainState{
 		cfg:    sCfg,
@@ -307,7 +307,7 @@ func (cs *ChainState) handleChainUpdates(ctx context.Context) {
 			work, err := cs.cfg.db.fetchAcceptedWork(parentID)
 			if err != nil {
 				// If the parent of the connected block is not an accepted
-				// work of the the pool, ignore it.
+				// work of the pool, ignore it.
 				if errors.Is(err, errs.ValueNotFound) {
 					log.Tracef("Block #%d (%s) is not an accepted "+
 						"work of the pool", parentHeight, parentHash)
@@ -434,7 +434,7 @@ func (cs *ChainState) handleChainUpdates(ctx context.Context) {
 				}
 
 				// If the parent of the disconnected block is not an accepted
-				// work of the the pool, ignore it.
+				// work of the pool, ignore it.
 			}
 
 			if confirmedWork != nil {
@@ -462,7 +462,7 @@ func (cs *ChainState) handleChainUpdates(ctx context.Context) {
 			work, err := cs.cfg.db.fetchAcceptedWork(id)
 			if err != nil {
 				// If the disconnected block is not an accepted
-				// work of the the pool, ignore it.
+				// work of the pool, ignore it.
 				if errors.Is(err, errs.ValueNotFound) {
 					close(msg.Done)
 					continue
diff --git a/pool/hub.go b/pool/hub.go
index b9c1d2c9..cde39cae 100644
--- a/pool/hub.go
+++ b/pool/hub.go
@@ -38,7 +38,7 @@ import (
 
 const (
 	// MaxReorgLimit is an estimated maximum chain reorganization limit.
-	// That is, it is highly improbable for the the chain to reorg beyond six
+	// That is, it is highly improbable for the chain to reorg beyond six
 	// blocks from the chain tip.
 	MaxReorgLimit = 6
 
diff --git a/pool/message.go b/pool/message.go
index a5e4887f..ac786c5a 100644
--- a/pool/message.go
+++ b/pool/message.go
@@ -627,10 +627,9 @@ func GenerateSolvedBlockHeader(headerE string, extraNonce1E string,
 		copy(headerEB[296:304], []byte(extraNonce2E))
 
 	// The Antiminer DR3 and DR5 return a 12-byte entraNonce comprised of the
-	// the extraNonce1 and extraNonce2 regardless of the extraNonce2Size
-	// specified in the mining.subscribe message. The nTime and nonce values
-	// submitted are big endian, they have to be reversed before block header
-	// reconstruction.
+	// extraNonce1 and extraNonce2 regardless of the extraNonce2Size specified
+	// in the mining.subscribe message. The nTime and nonce values submitted are
+	// big endian, they have to be reversed before block header reconstruction.
 	case AntminerDR3, AntminerDR5:
 		nTimeERev, err := hexReversed(nTimeE)
 		if err != nil {
@@ -667,9 +666,9 @@ func GenerateSolvedBlockHeader(headerE string, extraNonce1E string,
 
 	// The Whatsminer D1 does not respect the extraNonce2Size specified in the
 	// mining.subscribe response sent to it. The 8-byte extranonce submitted is
-	// is for the extraNonce1 and extraNonce2. The nTime and nonce values
-	// submitted are big endian, they have to be reversed to little endian
-	// before header reconstruction.
+	// for the extraNonce1 and extraNonce2. The nTime and nonce values submitted
+	// are big endian, they have to be reversed to little endian before header
+	// reconstruction.
 	case WhatsminerD1:
 		nTimeERev, err := hexReversed(nTimeE)
 		if err != nil {