single argument panic

note that sortmain.go has been run through hg gofmt;
only the formatting of the day initializers changed.
i'm happy to revert that formatting if you'd prefer.

stop on error in doc/progs/run

R=r
CC=golang-dev
https://golang.org/cl/850041
diff --git a/test/mallocfin.go b/test/mallocfin.go
index 44229d4..dc6d74b 100644
--- a/test/mallocfin.go
+++ b/test/mallocfin.go
@@ -58,9 +58,10 @@
 	for i := 0; i < N; i++ {
 		runtime.GC()
 		runtime.Gosched()
-		time.Sleep(1e6);
+		time.Sleep(1e6)
 	}
 	if nfinal < N*8/10 {
-		panic("not enough finalizing:", nfinal, "/", N)
+		println("not enough finalizing:", nfinal, "/", N)
+		panic("fail")
 	}
 }