casify tutorial examples

will bring document in line in a later CL, which may include revisiting some of the names

R=rsc
DELTA=58  (0 added, 0 deleted, 58 changed)
OCL=22906
CL=22908

1 files changed, 3 insertions, 3 deletions

diff --git a/doc/progs/print_string.go b/doc/progs/print_string.go
index c435d4eae..13a8d8241 100644
--- a/doc/progs/print_string.go
+++ b/doc/progs/print_string.go
@@ -6,13 +6,13 @@ package main
 
 import "fmt"
 
-type T struct { a int; b string }
+type testType struct { a int; b string }
 
-func (t *T) String() string {
+func (t *testType) String() string {
 	return fmt.Sprint(t.a) + " " + t.b
 }
 
 func main() {
-	t := &T{77, "Sunset Strip"};
+	t := &testType{77, "Sunset Strip"};
 	fmt.Println(t)
 }