delete all uses of panicln by rewriting them using panic or,
in the tests, println+panic.
gofmt some tests too.

R=rsc
CC=golang-dev
https://golang.org/cl/741041
diff --git a/test/fixedbugs/bug185.go b/test/fixedbugs/bug185.go
index 7f4bcb2..acae174 100644
--- a/test/fixedbugs/bug185.go
+++ b/test/fixedbugs/bug185.go
@@ -6,28 +6,30 @@
 
 package main
 
-func g() { }
+func g() {}
 
 func f1() (a, b int) {
-	a, b = 2, 1;
-	g();	// defeat optimizer
-	return a, b;
+	a, b = 2, 1
+	g() // defeat optimizer
+	return a, b
 }
 
 func f2() (a, b int) {
-	a, b = 1, 2;
-	g();	// defeat optimizer
-	return b, a;
+	a, b = 1, 2
+	g() // defeat optimizer
+	return b, a
 }
 
 func main() {
-	x, y := f1();
+	x, y := f1()
 	if x != 2 || y != 1 {
-		panicln("f1", x, y);
+		println("f1", x, y)
+		panic("fail")
 	}
 
-	x, y = f2();
+	x, y = f2()
 	if x != 2 || y != 1 {
-		panicln("f2", x, y);
+		println("f2", x, y)
+		panic("fail")
 	}
 }