Improve comment.
diff --git a/include/freetype/tttables.h b/include/freetype/tttables.h
index ce7ad79..8d4b202 100644
--- a/include/freetype/tttables.h
+++ b/include/freetype/tttables.h
@@ -678,9 +678,9 @@ FT_BEGIN_HEADER
* }
*
* Note that structures like @TT_Header or @TT_OS2 can't be used with
- * this function; the are limited to @FT_Get_Sfnt_Table. Reason is that
- * the size of those structures may vary depending on the processor
- * architecture (e.g. 32bit vs. 64bit or big endian vs. little endian).
+ * this function; they are limited to @FT_Get_Sfnt_Table. Reason is that
+ * those structures depend on the processor architecture, with varying
+ * size (e.g. 32bit vs. 64bit) or order (big endian vs. little endian).
*
*/
FT_EXPORT( FT_Error )