change date format in logs - was missing slash between month and day

R=rsc
DELTA=2  (0 added, 0 deleted, 2 changed)
OCL=35526
CL=35540

src/pkg/log/log.go

@@ -86,7 +86,7 @@ func (l *Logger) formatHeader(ns int64, calldepth int) string {
 	if l.flag & (Ldate | Ltime | Lmicroseconds) != 0 {
 		t := time.SecondsToLocalTime(ns/1e9);
 		if l.flag & (Ldate) != 0 {
-			h += itoa(int(t.Year), 4) + "/" + itoa(t.Month, 2) + itoa(t.Day, 2) + " ";
+			h += itoa(int(t.Year), 4) + "/" + itoa(t.Month, 2) + "/" + itoa(t.Day, 2) + " ";
 		}
 		if l.flag & (Ltime | Lmicroseconds) != 0 {
 			h += itoa(t.Hour, 2) + ":" + itoa(t.Minute, 2) + ":" + itoa(t.Second, 2);

src/pkg/log/log_test.go

@@ -14,7 +14,7 @@ import (
 )
 
 const (
-	Rdate		= `[0-9][0-9][0-9][0-9]/[0-9][0-9][0-9][0-9]`;
+	Rdate		= `[0-9][0-9][0-9][0-9]/[0-9][0-9]/[0-9][0-9]`;
 	Rtime		= `[0-9][0-9]:[0-9][0-9]:[0-9][0-9]`;
 	Rmicroseconds	= `\.[0-9][0-9][0-9][0-9][0-9][0-9]`;
 	Rline		= `[0-9]+:`;