BugFix for double encoding of posts that get trashed and restored

[ghost]

Description:

Trashing and untrashing posts double encodes SH shortcode content

Steps to reproduce:

1. Create a post
2. In the text tab of tiny mce add a SH shortcode with in it.
3. Save the post
4. Trash the post
5. Undo or Restore the post
6. Edit the post (to view double encoding)

Example short code `[php]

[/php]`

Expected output:

The user should be able trash and restore without altering the content of the shortcode

Actual Output:

The content of the shortcode get double encoded.

Tested with: WordPress 3.6-beta3-24430

[donnchawp]

I don't think this is an issue any more, at least with Gutenberg blocks.