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/bug120.go b/test/fixedbugs/bug120.go
index 06a07e8..2a71957 100644
--- a/test/fixedbugs/bug120.go
+++ b/test/fixedbugs/bug120.go
@@ -7,20 +7,20 @@
 package main
 
 import "os"
-import "strconv";
+import "strconv"
 
 type Test struct {
-	f float64;
-	in string;
-	out string;
+	f   float64
+	in  string
+	out string
 }
 
-var tests = []Test {
-	Test{ 123.5, "123.5", "123.5" },
-	Test{ 456.7, "456.7", "456.7" },
-	Test{ 1e23+8.5e6, "1e23+8.5e6", "1.0000000000000001e+23" },
-	Test{ 100000000000000008388608, "100000000000000008388608", "1.0000000000000001e+23" },
-	Test{ 1e23+8388609, "1e23+8388609", "1.0000000000000001e+23" },
+var tests = []Test{
+	Test{123.5, "123.5", "123.5"},
+	Test{456.7, "456.7", "456.7"},
+	Test{1e23 + 8.5e6, "1e23+8.5e6", "1.0000000000000001e+23"},
+	Test{100000000000000008388608, "100000000000000008388608", "1.0000000000000001e+23"},
+	Test{1e23 + 8388609, "1e23+8388609", "1.0000000000000001e+23"},
 
 	// "x" = the floating point value from converting the string x.
 	// These are exactly representable in 64-bit floating point:
@@ -33,27 +33,28 @@
 	// The correct answer, of course, would be "1e23+8388608" = 1e23+8388608.
 	// This is not going to be correct until 6g has multiprecision floating point.
 	// A simpler case is "1e23+1", which should also round to 1e23+8388608.
-	Test{ 1e23+8.388608e6, "1e23+8.388608e6", "1.0000000000000001e+23" },
-	Test{ 1e23+1, "1e23+1", "1.0000000000000001e+23" },
+	Test{1e23 + 8.388608e6, "1e23+8.388608e6", "1.0000000000000001e+23"},
+	Test{1e23 + 1, "1e23+1", "1.0000000000000001e+23"},
 }
 
 func main() {
-	ok := true;
+	ok := true
 	for i := 0; i < len(tests); i++ {
-		t := tests[i];
-		v := strconv.Ftoa64(t.f, 'g', -1);
+		t := tests[i]
+		v := strconv.Ftoa64(t.f, 'g', -1)
 		if v != t.out {
-			println("Bad float64 const:", t.in, "want", t.out, "got", v);
-			x, err := strconv.Atof64(t.out);
+			println("Bad float64 const:", t.in, "want", t.out, "got", v)
+			x, err := strconv.Atof64(t.out)
 			if err != nil {
-				panicln("bug120: strconv.Atof64", t.out);
+				println("bug120: strconv.Atof64", t.out)
+				panic("fail")
 			}
-			println("\twant exact:", strconv.Ftoa64(x, 'g', 1000));
-			println("\tgot exact: ", strconv.Ftoa64(t.f, 'g', 1000));
-			ok = false;
+			println("\twant exact:", strconv.Ftoa64(x, 'g', 1000))
+			println("\tgot exact: ", strconv.Ftoa64(t.f, 'g', 1000))
+			ok = false
 		}
 	}
 	if !ok {
-		os.Exit(1);
+		os.Exit(1)
 	}
 }