anchor.diff:                      <td>
                           <c:if test="${member.isAdmin()}">
                               <c:if test="${!loan.returned}">
  -                                <a href="#myModal" class="returnTableBtn btn" data-toggle="modal"
  +                                <a href="#myModal" class="returnTableBtn btn btn-default" data-toggle="modal"
                                      data-loan-id=${loan.id}>Return</a>
                               </c:if>
   
                               <form method="post" action="${pageContext.request.contextPath}/loans/delete/${loan.id}">
  -                                <button type="submit" class="btn">Delete</button>
  +                                <button type="submit" class="btn btn-default">Delete</button>
                               </form>
                           </c:if>
                       <td>
  
positive.code:         </table>
  
          <c:if test="${member.isAdmin()}">
              <a href="${pageContext.request.contextPath}/loans/new" class="btn">New loan</a>
          </c:if>
  
      <!-- Modal HTML -->
  
negative.code:                     <td>${loan.returned ? 'Returned' : 'Loaned'}</td>
                      <td>${loan.returnDate == null ? '-' : ''} <fmt:formatDate value="${loan.returnDate}"
                                                                                pattern="yyyy-MM-dd"/></td>
                      <td><a href="<c:url value="/member/${loan.member.id}"/>"><c:out value="${loan.member.givenName} ${loan.member.surname}" /></a></td>
                      <td><a href="<c:url value="/books/${loan.book.id}"/>"><c:out value="${loan.book.name}" /></a></td>
                      <td><c:choose>
                          <c:when test="${loan.returnBookState.getValue() eq 'new'}">
                              new
  