diff.py: add binary support

seed/applicationservice/2022.03.08/base/manual/install/diff.py

@@ -42,11 +42,15 @@ type = "installe"
 +++
 """)
 for filename in FILES:
+    print(f'- mise à jour du fichier {filename} :\n')
+    try:
         with open(join(OLD_DIR, filename[1:]), 'r') as ori:
             ori_content = ori.readlines()
         with open(join(NEW_DIR, filename[1:]), 'r') as new:
             new_content = new.readlines()
-    print(f'- mise à jour du fichier {filename} :\n')
+    except UnicodeDecodeError:
+        print('fichier binaire')
+    else:
         print('```diff')
         for line in unified_diff(ori_content, new_content, fromfile=filename, tofile=filename):
             print(line.rstrip())