code review 120570043: syscall: fix typo in comment

src/pkg/syscall/syscall_unix.go

 // Copyright 2009 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
 // +build darwin dragonfly freebsd linux netbsd openbsd solaris
 
 package syscall
 
 import (
         "runtime"
@@ skipping 38 matching lines @@
                 return nil, errno
         }
 
         // Slice memory layout
         var sl = struct {
                 addr uintptr
                 len  int
                 cap  int
         }{addr, length, length}
 
-        // Use unsafeto turn sl into a []byte.
+        // Use unsafe to turn sl into a []byte.
         b := *(*[]byte)(unsafe.Pointer(&sl))
 
         // Register mapping in m and return it.
         p := &b[cap(b)-1]
         m.Lock()
         defer m.Unlock()
         m.active[p] = b
         return b, nil
 }
 
@@ skipping 220 matching lines @@
 }
 
 func Sendfile(outfd int, infd int, offset *int64, count int) (written int, err error) {
         if raceenabled {
                 raceReleaseMerge(unsafe.Pointer(&ioSync))
         }
         return sendfile(outfd, infd, offset, count)
 }
 
 var ioSync int64