style: purge em dashes from the produced text

Assisted-by: GLM 5.3 Flash

verify/fuzz_extra_test.go

@@ -105,7 +105,7 @@ func TestBlockCount(t *testing.T) {
 
 func TestFillBuffer(t *testing.T) {
 	t.Run("zero", func(t *testing.T) {
-		// fillBuffer("zero") is a no-op — relies on make already zeroing.
+		// fillBuffer("zero") is a no-op; relies on make already zeroing.
 		buf := make([]byte, 16)
 		fillBuffer(buf, "zero")
 		for _, b := range buf {
@@ -159,7 +159,7 @@ func TestFuzzFuncChecked(t *testing.T) {
 	if !result.OK() {
 		t.Errorf("FuzzFuncChecked(sum): %s", result)
 	}
-	// Test with non-existent function — should report failure.
+	// Test with non-existent function; should report failure.
 	result = k.FuzzFuncChecked("nope", sig, 10, 0)
 	if result.OK() {
 		t.Error("FuzzFuncChecked(nope): expected failure")