Adjust documentation of mbedtls_cipher_update_ad
Fix indentation and capitalization
diff --git a/include/mbedtls/cipher.h b/include/mbedtls/cipher.h
index e8cae87..4a71383 100644
--- a/include/mbedtls/cipher.h
+++ b/include/mbedtls/cipher.h
@@ -682,10 +682,10 @@
* \param ctx The generic cipher context. This must be initialized.
* \param ad The additional data to use. This must be a readable
* buffer of at least \p ad_len Bytes.
- * \param ad_len the Length of \p ad Bytes.
+ * \param ad_len The Length of \p ad Bytes.
*
- * \return \c 0 on success.
- * \return A specific error code on failure.
+ * \return \c 0 on success.
+ * \return A specific error code on failure.
*/
int mbedtls_cipher_update_ad( mbedtls_cipher_context_t *ctx,
const unsigned char *ad, size_t ad_len );