Fix a/an typos in doxygen and other comments
Signed-off-by: Tom Cosgrove <tom.cosgrove@arm.com>
diff --git a/include/mbedtls/ssl.h b/include/mbedtls/ssl.h
index 5064ec5..9cfb00c 100644
--- a/include/mbedtls/ssl.h
+++ b/include/mbedtls/ssl.h
@@ -652,7 +652,7 @@
* for the associated \c mbedtls_ssl_get_timer_t callback to
* return correct information.
*
- * \note If using a event-driven style of programming, an event must
+ * \note If using an event-driven style of programming, an event must
* be generated when the final delay is passed. The event must
* cause a call to \c mbedtls_ssl_handshake() with the proper
* SSL context to be scheduled. Care must be taken to ensure