tuto2: Update for 2024

tutorial/adlin.sty

@@ -24,6 +24,30 @@
     \path[fill=black,draw=none] (interior.south west) rectangle node[white]{\huge\bfseries\texttt >\_} ([xshift=10mm]interior.north west);
   },#1}
 
+\usetikzlibrary{calc}
+\newtcolorbox{exercicebox}[1][parbox=false]{breakable,enhanced,
+  before=\hspace{.7em},after=\hspace{.5em},
+  tile,left=2mm,right=12mm,top=.5em,bottom=.5em,
+  frame code={\path[draw=Gold!85!gray,sharp corners,line width=2.5pt] (frame.north west) -- (frame.north) -- (frame.north east);}
+  sharp corners,
+  colback=white,
+  underlay={%
+    \path[fill=Gold!85!gray,draw=none] (interior.south east) rectangle node[white]{\begin{tikzpicture}
+\draw[fill=white,even odd rule]
+let
+\n{dpt} = {360/7}
+in
+(0,0) circle (1.2mm) %
+({\n{dpt}*(0.5)}:2.5mm) \foreach \x in {1,...,7}{ %
+arc ({\n{dpt}*(\x-0.5)}:{\n{dpt}*(\x-0.25)}:2.5mm) %
+--++(\x*\n{dpt}:1.5mm) %
+arc ({\n{dpt}*(\x-0.25)}:{\n{dpt}*(\x+0.25)}:2.5mm) %
+--++(\x*\n{dpt}:-1.5mm) %
+arc ({\n{dpt}*(\x+0.25)}:{\n{dpt}*(\x+0.5)}:2.5mm)--%
+({\n{dpt}*(\x+0.5)}:2.5mm)
+};\end{tikzpicture}} ([xshift=-10mm]interior.north east);
+  },#1}
+
 \newtcolorbox{questionbox}[1][]{breakable,enhanced,
   before skip balanced=2mm,after skip balanced=3mm,
   tile,left=11mm,right=2mm,top=1mm,bottom=1mm,