Minor typo fixes

Author: xuwei.fu

src/iceberg/manifest_list.h

@@ -52,7 +52,7 @@ struct ICEBERG_EXPORT PartitionFieldSummary {
   /// values are null or NaN
   std::optional<std::vector<uint8_t>> upper_bound;
 
-  inline static const SchemaField kConsTainsNull =
+  inline static const SchemaField kContainsNull =
       SchemaField::MakeRequired(509, "contains_null", std::make_shared<BooleanType>(),
                                 "True if any file has a null partition value");
   inline static const SchemaField kContainsNaN =

src/iceberg/snapshot.h

@@ -234,7 +234,7 @@ struct ICEBERG_EXPORT DataOperation {
 struct ICEBERG_EXPORT Snapshot {
   static constexpr int64_t kInvalidSnapshotId = -1;
 
-  /// A unqiue long ID.
+  /// A unique long ID.
   int64_t snapshot_id;
   /// The snapshot ID of the snapshot's parent. Omitted for any snapshot with no parent.
   std::optional<int64_t> parent_snapshot_id;

src/iceberg/table_metadata.h

@@ -69,9 +69,11 @@ struct ICEBERG_EXPORT MetadataLogEntry {
 /// \brief Represents the metadata for an Iceberg table
 ///
 /// Note that it only contains table metadata from the spec.  Compared to the Java
-/// implementation, missing pieces including: 1) Map<Integer,
-/// Schema|PartitionSpec|SortOrder> 2) List<MetadataUpdate> 3) Map<Long, Snapshot> 4)
-/// Map<String, SnapshotRef>
+/// implementation, missing pieces including:
+/// (1) Map<Integer, Schema|PartitionSpec|SortOrder>
+/// (2) List<MetadataUpdate>
+/// (3) Map<Long, Snapshot>
+/// (4) Map<String, SnapshotRef>
 struct ICEBERG_EXPORT TableMetadata {
   static constexpr int8_t kDefaultTableFormatVersion = 2;
   static constexpr int8_t kSupportedTableFormatVersion = 3;