anchor.diff:  		</div>
   		<hr>
   	
  -		<div class="panel panel-default col-md-6 col-md-offset-1">
  +		<div class="panel panel-default col-md-10 col-md-offset-1">
   			<div class="panel-heading ">
                   <ul class="nav panel-tabs">
   					<li><button type="button" href="#tab1"  data-toggle="tab" 
  
positive.code: 					</div>
  				</div>
  			</div>
  		</div>
  		
  		
  
negative.code: 			</div>
  		</div>
  		
  		<div class="panel panel-default col-md-10 col-md-offset-1">
  			<div class="panel-heading">
  				<h4>Your solution</h4>
  				<ul class="nav nav nav-tabs nav-tabs-horizontal">
  