minor tidy-up

Signed-off-by: Dave Rodgman <[email protected]>

configs/ext/README.md

@@ -1,11 +1,16 @@
 Summary
 -------
 
-All files in this directory are distributed under the normal Mbed TLS dual Apache 2.0 or GPLv2-or-later
-license, and are copyright The Mbed TLS Contributors.
+The two files:
+
+* crypto_config_profile_medium.h
+* tfm_mbedcrypto_config_profile_medium.h
+
+are copyright The Mbed TLS Contributors, and are distributed under the license normally
+used by Mbed TLS: a dual Apache 2.0 or GPLv2-or-later license.
 
 Background
------------
+----------
 
 The two files crypto_config_profile_medium.h and tfm_mbedcrypto_config_profile_medium.h
 are taken verbatim from the TF-M source code here:
@@ -16,5 +21,5 @@ In TF-M, they are distributed under a 3-Clause BSD license, as noted at the top
 
 In Mbed TLS, with permission from the TF-M project, they are distributed under a dual [Apache-2.0](https://spdx.org/licenses/Apache-2.0.html) OR [GPL-2.0-or-later](https://spdx.org/licenses/GPL-2.0-or-later.html) license, with copyright assigned to The Mbed TLS Contributors.
 
-We only retain the note at the top of the files because we are taking the files un-modified, for ease of
+We only retain the note at the top of the files because we are taking the files verbatim, for ease of
 maintenance.