code review 4620049: http: make Headers be source of truth

src/cmd/gofix/main.go

 // Copyright 2011 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 (
         "bytes"
         "exec"
         "flag"
@@ skipping 105 matching lines @@
 
         file, err := parser.ParseFile(fset, filename, src, parserMode)
         if err != nil {
                 return err
         }
 
         // Apply all fixes to file.
         newFile := file
         fixed := false
         for _, fix := range fixes {
-                if allowed != nil && !allowed[fix.desc] {
+                if allowed != nil && !allowed[fix.name] {
                         continue
                 }
                 if fix.f(newFile) {
                         fixed = true
                         fmt.Fprintf(&fixlog, " %s", fix.name)
 
                         // AST changed.
                         // Print and parse, to update any missing scoping
                         // or position information for subsequent fixers.
                         buf.Reset()
@@ skipping 112 matching lines @@
         f2.Write(b2)
 
         data, err = exec.Command("diff", "-u", f1.Name(), f2.Name()).CombinedOutput()
         if len(data) > 0 {
                 // diff exits with a non-zero status when the files don't match.
                 // Ignore that failure as long as we get output.
                 err = nil
         }
         return
 }