diff --git a/collate/build/builder_test.go b/collate/build/builder_test.go
index ff0aba3a..0e022ecb 100644
--- a/collate/build/builder_test.go
+++ b/collate/build/builder_test.go
@@ -65,7 +65,7 @@ func newBuilder(t *testing.T, ducet []ducetElem) *Builder {
 			ces = append(ces, ce.w)
 		}
 		if err := b.Add([]rune(e.str), ces, nil); err != nil {
-			t.Errorf(err.Error())
+			t.Error(err)
 		}
 	}
 	b.t = &table{}
diff --git a/collate/build/colelem.go b/collate/build/colelem.go
index 1aaa062c..f51faa1a 100644
--- a/collate/build/colelem.go
+++ b/collate/build/colelem.go
@@ -139,7 +139,7 @@ const (
 	maxPrimary          = illegalOffset + 1
 )
 
-// implicitPrimary returns the primary weight for the a rune
+// implicitPrimary returns the primary weight for the given rune
 // for which there is no entry for the rune in the collation table.
 // We take a different approach from the one specified in
 // https://unicode.org/reports/tr10/#Implicit_Weights,
diff --git a/collate/build/trie_test.go b/collate/build/trie_test.go
index 4d4f6e4d..5109e091 100644
--- a/collate/build/trie_test.go
+++ b/collate/build/trie_test.go
@@ -29,7 +29,7 @@ func makeTestTrie(t *testing.T) trie {
 	idx.addTrie(n)
 	tr, err := idx.generate()
 	if err != nil {
-		t.Errorf(err.Error())
+		t.Error(err)
 	}
 	return *tr
 }
diff --git a/internal/catmsg/codec.go b/internal/catmsg/codec.go
index 49c9fc97..547802b0 100644
--- a/internal/catmsg/codec.go
+++ b/internal/catmsg/codec.go
@@ -257,7 +257,7 @@ func (d *Decoder) setError(err error) {
 // Language returns the language in which the message is being rendered.
 //
 // The destination language may be a child language of the language used for
-// encoding. For instance, a decoding language of "pt-PT"" is consistent with an
+// encoding. For instance, a decoding language of "pt-PT" is consistent with an
 // encoding language of "pt".
 func (d *Decoder) Language() language.Tag { return d.tag }
 
diff --git a/internal/cldrtree/generate.go b/internal/cldrtree/generate.go
index 0f0b5f3b..bdd77ce8 100644
--- a/internal/cldrtree/generate.go
+++ b/internal/cldrtree/generate.go
@@ -21,7 +21,7 @@ func generate(b *Builder, t *Tree, w *gen.CodeWriter) error {
 
 	fmt.Fprintf(w, "var tree = &cldrtree.Tree{locales, indices, buckets}\n\n")
 
-	w.WriteComment("Path values:\n" + b.stats())
+	w.WriteComment("Path values:\n%s", b.stats())
 	fmt.Fprintln(w)
 
 	// Generate enum types.
diff --git a/internal/colltab/collelem.go b/internal/colltab/collelem.go
index 0c23c8a4..bdcae9b1 100644
--- a/internal/colltab/collelem.go
+++ b/internal/colltab/collelem.go
@@ -354,7 +354,7 @@ const (
 	maxPrimary          = illegalOffset + 1
 )
 
-// implicitPrimary returns the primary weight for the a rune
+// implicitPrimary returns the primary weight for the given rune
 // for which there is no entry for the rune in the collation table.
 // We take a different approach from the one specified in
 // https://unicode.org/reports/tr10/#Implicit_Weights,
diff --git a/internal/gen/code.go b/internal/gen/code.go
index 75435c9b..fa4002b4 100644
--- a/internal/gen/code.go
+++ b/internal/gen/code.go
@@ -342,8 +342,7 @@ func (w *CodeWriter) writeSlice(x interface{}, isArray bool) {
 			if !reflect.DeepEqual(zero, x) {
 				line := fmt.Sprintf("%#v,\n", x)
 				line = line[strings.IndexByte(line, '{'):]
-				w.printf("%d: ", i)
-				w.printf(line)
+				w.printf("%d: %s", i, line)
 			}
 		}
 	case reflect.Array:
diff --git a/message/pipeline/pipeline.go b/message/pipeline/pipeline.go
index 34f15f8a..2b07e38b 100644
--- a/message/pipeline/pipeline.go
+++ b/message/pipeline/pipeline.go
@@ -58,7 +58,7 @@ type Config struct {
 	//   1. From the Language field in the file.
 	//   2. If not present, from a valid language tag in the filename, separated
 	//      by dots (e.g. "en-US.json" or "incoming.pt_PT.xmb").
-	//   3. If not present, from a the closest subdirectory in which the file
+	//   3. If not present, from the closest subdirectory in which the file
 	//      is contained that parses as a valid language tag.
 	TranslationsPattern string
 
diff --git a/number/doc.go b/number/doc.go
index 87662308..1999bc8f 100644
--- a/number/doc.go
+++ b/number/doc.go
@@ -11,16 +11,15 @@
 //
 //	p := message.NewPrinter(language.English)
 //
-//	p.Printf("%v bottles of beer on the wall.", number.Decimal(1234))
+//	p.Printf("%v bottles of beer on the wall.\n", number.Decimal(1234))
 //	// Prints: 1,234 bottles of beer on the wall.
 //
-//	p.Printf("%v of gophers lose too much fur", number.Percent(0.12))
+//	p.Printf("%v of gophers lose too much fur.\n", number.Percent(0.12))
 //	// Prints: 12% of gophers lose too much fur.
 //
-//	p := message.NewPrinter(language.Dutch)
-//
-//	p.Printf("There are %v bikes per household.", number.Decimal(1.2))
-//	// Prints: Er zijn 1,2 fietsen per huishouden.
+//	p = message.NewPrinter(language.Dutch)
+//	p.Printf("There are %v bikes per household.\n", number.Decimal(1.2))
+//	// Prints: There are 1,2 bikes per household.
 //
 // The width and scale specified in the formatting directives override the
 // configuration of the formatter.
diff --git a/unicode/norm/maketables.go b/unicode/norm/maketables.go
index 76534da2..09d40135 100644
--- a/unicode/norm/maketables.go
+++ b/unicode/norm/maketables.go
@@ -235,7 +235,7 @@ func loadUnicodeData() {
 	}
 }
 
-// compactCCC converts the sparse set of CCC values to a continguous one,
+// compactCCC converts the sparse set of CCC values to a contiguous one,
 // reducing the number of bits needed from 8 to 6.
 func compactCCC() {
 	m := make(map[uint8]uint8)