content: emphasize that math.pi error is intentional
Some people who rush through the tour miss the fact that the
error is the point.
Fixes golang/go#11623
Change-Id: Ibcdf268f3f2b5a5fdf2f41fb6039c64d27a8380f
Reviewed-on: https://go-review.googlesource.com/15557
Reviewed-by: Andrew Gerrand <adg@golang.org>
diff --git a/content/basics.article b/content/basics.article
index aebcfeb..e68f076 100644
--- a/content/basics.article
+++ b/content/basics.article
@@ -42,7 +42,9 @@
`Foo` is an exported name, as is `FOO`. The name `foo` is not exported.
-Run the code. Then rename `math.pi` to `math.Pi` and try it again.
+Run the code. Notice the error message.
+
+To fix the error, rename `math.pi` to `math.Pi` and try it again.
.play basics/exported-names.go
