code review 8896045: all: fix typos

doc/codewalk/urlpoll.go

 // Copyright 2010 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.
 
 package main
 
 import (
         "log"
         "net/http"
         "time"
@@ skipping 58 matching lines @@
         resp, err := http.Head(r.url)
         if err != nil {
                 log.Println("Error", r.url, err)
                 r.errCount++
                 return err.Error()
         }
         r.errCount = 0
         return resp.Status
 }
 
-// Sleep sleeps for an appropriate interval (dependant on error state)
+// Sleep sleeps for an appropriate interval (dependent on error state)
 // before sending the Resource to done.
 func (r *Resource) Sleep(done chan<- *Resource) {
         time.Sleep(pollInterval + errTimeout*time.Duration(r.errCount))
         done <- r
 }
 
 func Poller(in <-chan *Resource, out chan<- *Resource, status chan<- State) {
         for r := range in {
                 s := r.Poll()
                 status <- State{r.url, s}
@@ skipping 17 matching lines @@
         go func() {
                 for _, url := range urls {
                         pending <- &Resource{url: url}
                 }
         }()
 
         for r := range complete {
                 go r.Sleep(pending)
         }
 }