add ownership note and fix typos

include/dlpack/dlpack.h

@@ -262,7 +262,7 @@ typedef struct DLManagedTensor {
    * \brief Destructor - this should be called
    * to destruct the manager_ctx  which backs the DLManagedTensor. It can be
    * NULL if there is no way for the caller to provide a reasonable destructor.
-   * The destructors deletes the argument self as well.
+   * The destructor deletes the argument self as well.
    */
   void (*deleter)(struct DLManagedTensor * self);
 } DLManagedTensor;
@@ -272,7 +272,12 @@ typedef struct DLManagedTensor {
 /*! \brief bit mask to indicate that the tensor is read only. */
 #define DLPACK_FLAG_BITMASK_READ_ONLY (1UL << 0UL)
 
-/*! \brief bit mask to indicate that the tensor is a copy made by the producer. */
+/*!
+ * \brief bit mask to indicate that the tensor is a copy made by the producer.
+ *
+ * If set, the tensor is considered solely owned throughout its lifetime by the
+ * consumer, until the producer-provided deleter is invoked.
+ */
 #define DLPACK_FLAG_BITMASK_IS_COPIED (1UL << 1UL)
 
 /*!
@@ -302,7 +307,7 @@ struct DLManagedTensorVersioned {
    *
    * This should be called to destruct manager_ctx which holds the DLManagedTensorVersioned.
    * It can be NULL if there is no way for the caller to provide a reasonable
-   * destructor. The destructors deletes the argument self as well.
+   * destructor. The destructor deletes the argument self as well.
    */
   void (*deleter)(struct DLManagedTensorVersioned *self);
   /*!