Fix typos/style in doxygen documentation
diff --git a/include/mbedtls/memory_buffer_alloc.h b/include/mbedtls/memory_buffer_alloc.h
index 3408f34..5e14823 100644
--- a/include/mbedtls/memory_buffer_alloc.h
+++ b/include/mbedtls/memory_buffer_alloc.h
@@ -127,7 +127,7 @@
* is defined. (Includes stack trace information for each block if
* MBEDTLS_MEMORY_BACKTRACE is defined as well).
*
- * \returns 0 if verified, 1 otherwise
+ * \return 0 if verified, 1 otherwise
*/
int mbedtls_memory_buffer_alloc_verify( void );