codelab/wiki: fix build

TBR=adg
CC=golang-dev
https://golang.org/cl/4077045

doc/codelab/wiki/test.sh

-#1/bin/bash
+#!/bin/bash
 
 ./final.bin &
 wiki_pid=$!
@@ -13,11 +13,11 @@ trap cleanup INT
 sleep 1
 
 curl -s -o test_edit.out http://localhost:8080/edit/Test 
-cmp test_edit.out test_edit.good || cleanup 1
+diff -u test_edit.out test_edit.good || cleanup 1
 curl -s -o /dev/null -d body=some%20content http://localhost:8080/save/Test
-cmp Test.txt test_Test.txt.good || cleanup 1
+diff -u Test.txt test_Test.txt.good || cleanup 1
 curl -s -o test_view.out http://localhost:8080/view/Test
-cmp test_view.out test_view.good || cleanup 1
+diff -u test_view.out test_view.good || cleanup 1
 
 echo "Passed"
 cleanup 0

doc/codelab/wiki/test_edit.good

 <h1>Editing Test</h1>
 
 <form action="/save/Test" method="POST">
-<div><textarea name="Body" rows="20" cols="80"></textarea></div>
+<div><textarea name="body" rows="20" cols="80"></textarea></div>
 <div><input type="submit" value="Save"></div>
 </form>