a licence in wordcount

Author: parmentelat

notebooks/exos/basic/EXO-wordcounts-readme-nb.md

@@ -1,9 +1,5 @@
 ---
 jupytext:
-  cell_metadata_filter: all,-hidden,-heading_collapsed,-run_control,-trusted
-  notebook_metadata_filter: all, -jupytext.text_representation.jupytext_version, -jupytext.text_representation.format_version,
-    -language_info.version, -language_info.codemirror_mode.version, -language_info.codemirror_mode,
-    -language_info.file_extension, -language_info.mimetype, -toc
   text_representation:
     extension: .md
     format_name: myst
@@ -19,6 +15,13 @@ nbhosting:
   title: comptages de mots
 ---
 
+<div class="licence">
+<span>Licence CC BY-NC-ND</span>
+<span>Thierry Parmentelat &amp; Arnaud Legout</span>
+</div>
+
++++
+
 # classe `WordCounts`
 
 on veut calculer la fréquence d'apparition des mots dans un texte