Fixup: Improve comment on helper macros in md_internal.h
diff --git a/include/mbedtls/md_internal.h b/include/mbedtls/md_internal.h
index d44c8af..38f89db 100644
--- a/include/mbedtls/md_internal.h
+++ b/include/mbedtls/md_internal.h
@@ -132,11 +132,11 @@
#define MBEDTLS_MD_INFO_CLONE_FUNC_T( MD ) MD ## _CLONE_FUNC
#define MBEDTLS_MD_INFO_PROCESS_FUNC_T( MD ) MD ## _PROCESS_FUNC
-/* Wrapper around MBEDTLS_MD_INFO_XXX_T() which makes sure that
+/* Wrapper around MBEDTLS_MD_INFO_{FIELD}_T() which makes sure that
* the argument is macro-expanded before concatenated with the
* field name. This allows to call these macros as
- * MBEDTLS_MD_INFO_XXX( MBEDTLS_MD_SINGLE_HASH ).
- * where MBEDTLS_MD_SINGLE_HASH expands to MBEDTLS_MD_INFO_XXX. */
+ * MBEDTLS_MD_INFO_{FIELD}( MBEDTLS_MD_SINGLE_HASH ).
+ * where MBEDTLS_MD_SINGLE_HASH expands to MBEDTLS_MD_INFO_{DIGEST}. */
#define MBEDTLS_MD_INFO_CTX_TYPE( MD ) MBEDTLS_MD_INFO_CTX_TYPE_T( MD )
#define MBEDTLS_MD_INFO_INIT_FUNC( MD ) MBEDTLS_MD_INFO_INIT_FUNC_T( MD )
#define MBEDTLS_MD_INFO_TYPE( MD ) MBEDTLS_MD_INFO_TYPE_T( MD )