Fixed mismatch of preview in the pattern of a particular

hoogle command because the output is extra message when you search for
a particular query, the preview does not match the candidate.
For this reason, it is skipped extra message.

The following is a specific pattern and its source.

https://github.com/ndmitchell/hoogle/blob/master/src/Hoogle/Query/Suggest.hs

case 1: Search Google

```output:
Google rocks!
```

case 2: Search ?oogle (ex. hoogle)

```output:
Can't think of anything more interesting to search for?
```

case 3: Suggestion message of "Did you mean: " (ex. search "IO String")

```output:
Did you mean: :: IO String
```

case 4: None search result (ex. search "foo-bar-baz")

```output:
No results found
```

case 5: Conbination of case 2 and case 4 (ex. coogle)

```output:
Can't think of anything more interesting to search for?
No results found
```
Improved deletion of verbose message

Delete the following message will be added when you add the `verbose` flag
to hoogle command.

Search results are output after the message `= ANSWER =`.
Tags such as `  -- ` and `  -- Exact` and `  -- PrefixCI+Substr` is added
to the search results.
Fixed a mismatch case of not containing ` -- http://` in the search results
Merge pull request #3 from shiena/patch/fix_mismatch_preview

Fixed mismatch of preview in the pattern of a particular