finish up PR67. Also add missing <\pre> tags (#130)

diff --git a/include/message_buffer.h b/include/message_buffer.h
index 7568d2d..a9b0def 100644
--- a/include/message_buffer.h
+++ b/include/message_buffer.h
@@ -218,7 +218,7 @@
  *                         const void *pvTxData,

  *                         size_t xDataLengthBytes,

  *                         TickType_t xTicksToWait );

- * <pre>

+ * </pre>

  *

  * Sends a discrete message to the message buffer.  The message can be any

  * length that fits within the buffer's free space, and is copied into the

@@ -318,7 +318,7 @@
  *                                const void *pvTxData,

  *                                size_t xDataLengthBytes,

  *                                BaseType_t *pxHigherPriorityTaskWoken );

- * <pre>

+ * </pre>

  *

  * Interrupt safe version of the API function that sends a discrete message to

  * the message buffer.  The message can be any length that fits within the