Clean some spell check words. (#439)

include/message_buffer.h

@@ -125,7 +125,7 @@ typedef void * MessageBufferHandle_t;
  *  // Create a message buffer that can hold 100 bytes.  The memory used to hold
  *  // both the message buffer structure and the messages themselves is allocated
  *  // dynamically.  Each message added to the buffer consumes an additional 4
- *  // bytes which are used to hold the lengh of the message.
+ *  // bytes which are used to hold the length of the message.
  *  xMessageBuffer = xMessageBufferCreate( xMessageBufferSizeBytes );
  *
  *  if( xMessageBuffer == NULL )

include/queue.h

@@ -1420,7 +1420,7 @@ BaseType_t xQueueReceiveFromISR( QueueHandle_t xQueue,
 
 /*
  * Utilities to query queues that are safe to use from an ISR.  These utilities
- * should be used only from witin an ISR, or within a critical section.
+ * should be used only from within an ISR, or within a critical section.
  */
 BaseType_t xQueueIsQueueEmptyFromISR( const QueueHandle_t xQueue ) PRIVILEGED_FUNCTION;
 BaseType_t xQueueIsQueueFullFromISR( const QueueHandle_t xQueue ) PRIVILEGED_FUNCTION;

include/semphr.h

@@ -808,7 +808,7 @@ typedef QueueHandle_t SemaphoreHandle_t;
  * Creates a new recursive mutex type semaphore instance, and returns a handle
  * by which the new recursive mutex can be referenced.
  *
- * Internally, within the FreeRTOS implementation, recursive mutexs use a block
+ * Internally, within the FreeRTOS implementation, recursive mutexes use a block
  * of memory, in which the mutex structure is stored.  If a recursive mutex is
  * created using xSemaphoreCreateRecursiveMutex() then the required memory is
  * automatically dynamically allocated inside the
@@ -877,7 +877,7 @@ typedef QueueHandle_t SemaphoreHandle_t;
  * Creates a new recursive mutex type semaphore instance, and returns a handle
  * by which the new recursive mutex can be referenced.
  *
- * Internally, within the FreeRTOS implementation, recursive mutexs use a block
+ * Internally, within the FreeRTOS implementation, recursive mutexes use a block
  * of memory, in which the mutex structure is stored.  If a recursive mutex is
  * created using xSemaphoreCreateRecursiveMutex() then the required memory is
  * automatically dynamically allocated inside the

include/stream_buffer.h

@@ -495,7 +495,7 @@ size_t xStreamBufferSendFromISR( StreamBufferHandle_t xStreamBuffer,
  *
  *  if( xReceivedBytes > 0 )
  *  {
- *      // A ucRxData contains another xRecievedBytes bytes of data, which can
+ *      // A ucRxData contains another xReceivedBytes bytes of data, which can
  *      // be processed here....
  *  }
  * }

include/timers.h

@@ -1352,7 +1352,7 @@ BaseType_t xTimerGenericCommand( TimerHandle_t xTimer,
  * configSUPPORT_STATIC_ALLOCATION is set.  For more information see this URI: https://www.FreeRTOS.org/a00110.html#configSUPPORT_STATIC_ALLOCATION
  *
  * @param ppxTimerTaskTCBBuffer   A handle to a statically allocated TCB buffer
- * @param ppxTimerTaskStackBuffer A handle to a statically allocated Stack buffer for thie idle task
+ * @param ppxTimerTaskStackBuffer A handle to a statically allocated Stack buffer for the idle task
  * @param pulTimerTaskStackSize   A pointer to the number of elements that will fit in the allocated stack buffer
  */
     void vApplicationGetTimerTaskMemory( StaticTask_t ** ppxTimerTaskTCBBuffer,