Merge branch 'jeremy.meissner-master-patch-63742' into 'master'

Update cours_5.md

See merge request algorithmique/cours!39

slides/cours_5.md

@@ -249,7 +249,9 @@ $$
     
     ```C
     num = 247
-    tant que (2^N < num) {
+    N = 0
+
+    tant que (2^(N+1) < num) {
         N += 1
     }
     ```