[docs] fixed some common typos (#9752)

include/openthread/coap.h

@@ -357,7 +357,7 @@ typedef void (*otCoapResponseHandler)(void                *aContext,
 typedef void (*otCoapRequestHandler)(void *aContext, otMessage *aMessage, const otMessageInfo *aMessageInfo);
 
 /**
- * Pointer is called when a CoAP message with an block-wise transfer option is received.
+ * Pointer is called when a CoAP message with a block-wise transfer option is received.
  *
  * Is available when OPENTHREAD_CONFIG_COAP_BLOCKWISE_TRANSFER_ENABLE configuration
  * is enabled.

include/openthread/dns_client.h

@@ -408,7 +408,7 @@ otError otDnsBrowseResponseGetServiceName(const otDnsBrowseResponse *aResponse,
  * MUST only be used from `otDnsBrowseCallback`.
  *
  * The response may include multiple service instance records. @p aIndex can be used to iterate through the list. Index
- * zero gives the the first record. When we reach end of the list, `OT_ERROR_NOT_FOUND` is returned.
+ * zero gives the first record. When we reach end of the list, `OT_ERROR_NOT_FOUND` is returned.
  *
  * Note that this function gets the service instance label and not the full service instance name which is of the form
  * `<Instance>.<Service>.<Domain>`.

include/openthread/instance.h

@@ -53,7 +53,7 @@ extern "C" {
  * @note This number versions both OpenThread platform and user APIs.
  *
  */
-#define OPENTHREAD_API_VERSION (388)
+#define OPENTHREAD_API_VERSION (389)
 
 /**
  * @addtogroup api-instance

include/openthread/tcp.h

@@ -231,7 +231,7 @@ typedef void (*otTcpDisconnected)(otTcpEndpoint *aEndpoint, otTcpDisconnectedRea
 /**
  * Represents a TCP endpoint.
  *
- * An TCP endpoint acts an endpoint of TCP connection. It can be used to
+ * A TCP endpoint acts an endpoint of TCP connection. It can be used to
  * initiate TCP connections, and, once a TCP connection is established, send
  * data to and receive data from the connection peer.
  *

include/openthread/thread.h

@@ -238,7 +238,7 @@ typedef void (*otDetachGracefullyCallback)(void *aContext);
  * @param[in] aEnabled  TRUE if Thread is enabled, FALSE otherwise.
  *
  * @retval OT_ERROR_NONE           Successfully started Thread protocol operation.
- * @retval OT_ERROR_INVALID_STATE  The network interface was not not up.
+ * @retval OT_ERROR_INVALID_STATE  The network interface was not up.
  *
  */
 otError otThreadSetEnabled(otInstance *aInstance, bool aEnabled);