Experimental stringification has a problem with mixed quotes in some instanaces

[underscorebrody]

Example of a problem scenario:

<input name="password" class="form-control" data-ng-model="admin_password" type="password" data-ng-attr-placeholder="{{'Enter a password for the user \'admin\'' | translate}}" required>

[underscorebrody]

cc @evilaliv3

[evilaliv3]

this issue has been already solved by #146 and can be closed.

thanks @underscorebrody

[underscorebrody]

Okay thanks!