Make sharper corners

todonotes.dtx

@@ -1552,7 +1552,7 @@
     line width=0.5pt,
     text width = \@todonotes@textwidth - 1.6 ex - 1pt,
     inner sep = 0.8 ex,
-    rounded corners=4pt]
+    rounded corners=1pt]
 %    \end{macrocode}
 % Add shadows and rounded corners to the inserted todonotes.
 %    \begin{macrocode}
@@ -1807,7 +1807,7 @@
     (-2, -2.5) rectangle +(\@todonotes@currentfigwidth, \@todonotes@currentfigheight);
 \draw (2, -0.3) node[right, text
     width=\@todonotes@currentfigwidth-4.5cm] {#2};
-\draw[red, fill=white, rounded corners = 5pt, line width=10pt]
+\draw[red, fill=white, rounded corners = 1pt, line width=10pt]
     (30:2cm) -- (150:2cm) -- (270:2cm) -- cycle;
 \draw (0, 0.3) node {\@todonotes@MissingFigureUp};
 \draw (0, -0.3) node {\@todonotes@MissingFigureDown};