go.tools/imports: fails to parse valid Go code

[dgryski]

(Sorry I haven't managed to trim down the test case.  In doing so, I kept running into
the formatting problem I just reported with strange comment movements.)


What steps will reproduce the problem?
1. git clone github.com/dgryski/dkrcrypt  
2. edit aria.go, add "var _ cipher.Block = &AriaCipher{}" at the bottom
3. goimports

What is the expected output?
The crypto/cipher import is added.

What do you see instead?
I get a warning added to the top of my fail (which then fails to compile -- this may be
vim integration problems).
2013/12/18 10:16:12 addImportViaSourceModification error: 194:3: expected 1 expression
and the crypto/cipher import is added oddly split across a comment:

import
  
// The ARIA Block cipher from KISA
// Copyright (c) 2012 Damian Gryski <damian@gryski.com>
// Licensed under the GPLv3 or, at your option, any later version.
"crypto/cipher"

[adg]

Comment 1:

Labels changed: added repo-tools.

Status changed to Accepted.

[bradfitz]

Comment 2:

Pretty sure this is the same as issue #7107,  which has a smaller summary and examples.

Status changed to Duplicate.

Merged into issue #7107.