diff --git a/_posts/2023-01-19-totw-218.md b/_posts/2023-01-19-totw-218.md
index 47febbdc..7e978443 100644
--- a/_posts/2023-01-19-totw-218.md
+++ b/_posts/2023-01-19-totw-218.md
@@ -102,20 +102,24 @@ a friend function template in their type named `SketchyDraw` with the
 appropriate signature. the template overload above will use ADL to find the
 `SketchyDraw` function. For example,
 
-</pre>
+<pre class="prettyprint lang-cpp code">
 class Triangle {
  public:
   explicit Triangle(Point a, Point b, Point c) : a_(a), b_(b), c_(c) {}
 
-template &lt;typename SC&gt; friend void SketchyDraw(SC& canvas, const Triangle&
-triangle) { // Note: This is a template, even though the only type we ever
-expect to be // passed in for `SC` is `sketchy::Canvas`. Using `sketchy::Canvas`
-directly // works, but pulls in an extra dependency that may not be used by all
-users // of `Triangle`. sketchy::Draw(canvas, sketchy::Line(triangle.a_,
-triangle.b_)); sketchy::Draw(canvas, sketchy::Line(triangle.b_, triangle.c_));
-sketchy::Draw(canvas, sketchy::Line(triangle.c_, triangle.a_)); }
+  template &lt;typename SC&gt; friend void SketchyDraw(SC& canvas, const Triangle&
+    triangle) { // Note: This is a template, even though the only type we ever expect to be
+                // passed in for `SC` is `sketchy::Canvas`. Using `sketchy::Canvas` directly
+                // works, but pulls in an extra dependency that may not be used by all users
+                // of `Triangle`.
+    sketchy::Draw(canvas, sketchy::Line(triangle.a_, triangle.b_));
+    sketchy::Draw(canvas, sketchy::Line(triangle.b_, triangle.c_));
+    sketchy::Draw(canvas, sketchy::Line(triangle.c_, triangle.a_));
+  }
 
-private: Point a_, b_, c_; };
+ private:
+  Point a_, b_, c_;
+};
 
 // Usage:
 void DrawTriangles(sketchy::Canvas& canvas, absl::Span&lt;const Triangle&gt; triangles) {