Correct the problem from the wrong insert .btn

I do not know why, but the insertion was to happen like this:
```
<button type="button" class="btn btn-default">button</button
type="button">
```
Now the second step - this is an indication of attributes (the default
type = "button")
Merge pull request #11 from pafnuty/master

Correct the problem from the wrong insert .btn