[chore]: fix article and word typos in doc comments (#8972)

A sweep of doc-comment typos on exported (and internal production) APIs:

- `trace/tracestate.go:286`: "more members **then** is allowed" → "than"
- `codes/codes.go:35` and 6 sibling sites (`metric/meter.go`,
`sdk/metric/exemplar/value.go`, `sdk/metric/aggregation.go` ×2,
`sdk/metric/metricdata/data.go`, `sdk/metric/view.go`,
`sdk/trace/snapshot.go`): "an
32-bit/token/float64/histogram/slice/Stream/record" → "a …"
- `trace/internal/telemetry/value.go:330`: "a slog.Kind is is not
handled" → "is not handled"

Comment-only, no code or API change — hence the `[chore]` title instead
of a changelog entry. Every replacement verified with grep
(word-boundary) against the tree.

Assisted-By: GLM (ZCode agent), per the OTel Generative AI contribution
policy; human-reviewed.

Co-authored-by: Robert Pająk <pellared@hotmail.com>
Co-authored-by: Damien Mathieu <42@dmathieu.com>

codes/codes.go

@@ -32,7 +32,7 @@ const (
 	maxCode = 3
 )
 
-// Code is an 32-bit representation of a status state.
+// Code is a 32-bit representation of a status state.
 type Code uint32
 
 var codeToStr = map[Code]string{

metric/meter.go

@@ -320,7 +320,7 @@ type Observer interface {
 	ObserveInt64(obsrv Int64Observable, value int64, opts ...ObserveOption)
 }
 
-// Registration is an token representing the unique registration of a callback
+// Registration is a token representing the unique registration of a callback
 // for a set of instruments with a Meter.
 //
 // Warning: Methods may be added to this interface in minor releases. See

sdk/metric/aggregation.go

@@ -79,7 +79,7 @@ func (l AggregationLastValue) copy() Aggregation { return l }
 func (AggregationLastValue) err() error { return nil }
 
 // AggregationExplicitBucketHistogram is an Aggregation that summarizes a set of
-// measurements as an histogram with explicitly defined buckets.
+// measurements as a histogram with explicitly defined buckets.
 type AggregationExplicitBucketHistogram struct {
 	// Boundaries are the increasing bucket boundary values. Boundary values
 	// define bucket upper bounds. Buckets are exclusive of their lower
@@ -138,7 +138,7 @@ func (h AggregationExplicitBucketHistogram) copy() Aggregation {
 }
 
 // AggregationBase2ExponentialHistogram is an Aggregation that summarizes a set of
-// measurements as an histogram with bucket widths that grow exponentially.
+// measurements as a histogram with bucket widths that grow exponentially.
 type AggregationBase2ExponentialHistogram struct {
 	// MaxSize is the maximum number of buckets to use for the histogram.
 	MaxSize int32

sdk/metric/exemplar/value.go

@@ -49,8 +49,8 @@ func (v Value) Int64() int64 {
 	return 0
 }
 
-// Float64 returns the value of v as an float64. If the ValueType of v is not
-// an Float64ValueType, 0 is returned.
+// Float64 returns the value of v as a float64. If the ValueType of v is not
+// a Float64ValueType, 0 is returned.
 func (v Value) Float64() float64 {
 	if v.t == Float64ValueType {
 		return math.Float64frombits(v.val)

sdk/metric/metricdata/data.go

@@ -190,7 +190,7 @@ type ExponentialHistogramDataPoint[N int64 | float64] struct {
 type ExponentialBucket struct {
 	// Offset is the bucket index of the first entry in the Counts slice.
 	Offset int32
-	// Counts is an slice where Counts[i] carries the count of the bucket at
+	// Counts is a slice where Counts[i] carries the count of the bucket at
 	// index (Offset+i). Counts[i] is the count of values greater than
 	// base^(Offset+i) and less than or equal to base^(Offset+i+1).
 	Counts []uint64

sdk/metric/view.go

@@ -44,7 +44,7 @@ type View func(Instrument) (Stream, bool)
 // the Instrument the View matches against will be use for the Name,
 // Description, and Unit of the returned Stream and no Aggregation or
 // AttributeFilter are set. All non-zero-value fields of mask are used instead
-// of the default. If you need to zero out an Stream field returned from a
+// of the default. If you need to zero out a Stream field returned from a
 // View, create a View directly.
 func NewView(criteria Instrument, mask Stream) View {
 	if criteria.IsEmpty() {

sdk/trace/snapshot.go

@@ -12,7 +12,7 @@ import (
 	"go.opentelemetry.io/otel/trace"
 )
 
-// snapshot is an record of a spans state at a particular checkpointed time.
+// snapshot is a record of a span's state at a particular checkpointed time.
 // It is used as a read-only representation of that state.
 type snapshot struct {
 	name                  string

trace/internal/telemetry/value.go

@@ -327,7 +327,7 @@ func (v Value) String() string {
 		// Try to handle this as gracefully as possible.
 		//
 		// Don't panic here. The goal here is to have developers find this
-		// first if a slog.Kind is is not handled. It is
+		// first if a slog.Kind is not handled. It is
 		// preferable to have user's open issue asking why their attributes
 		// have a "unhandled: " prefix than say that their code is panicking.
 		return fmt.Sprintf("<unhandled telemetry.ValueKind: %s>", v.Kind())

trace/tracestate.go

@@ -283,7 +283,7 @@ func (ts TraceState) Walk(f func(key, value string) bool) {
 // specification an error is returned with the original TraceState.
 //
 // If adding a new list-member means the TraceState would have more members
-// then is allowed, the new list-member will be inserted and the right-most
+// than is allowed, the new list-member will be inserted and the right-most
 // list-member will be dropped in the returned TraceState.
 func (ts TraceState) Insert(key, value string) (TraceState, error) {
 	m, err := newMember(key, value)