我嘗試使用引導(dǎo)程序制作面包屑線，thymeleaf但它有一個(gè)奇怪的破碎高度。像這樣代碼<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.4.1/css/bootstrap.min.css"><nav class="navbar navbar-expand-lg navbar-light bg-light border-bottom">    <!--<div class="collapse navbar-collapse" id="navbarSupportedContent">-->    <div class="navbar-nav container">        <ol class="breadcrumb mr-auto">            <li class="breadcrumb-item">                <a th:href="@{/account/notebooks}">                    <i class="fas fa-book"></i>                    Notebooks                </a>            </li>            <li class="breadcrumb-item">                <a th:href="@{'/notebook/{notebookId}/edit' (notebookId=${notebook.id})}">                    <div th:text="${notebook.title}"></div>                </a>            </li>            <li class="breadcrumb-item" th:if="${currentNote} != null">                <a class="nav-link dropdown-toggle" href="#" role="button" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false" th:text="${currentNote.name}">                </a>            </li>        </ol>    </div></nav><script src="https://code.jquery.com/jquery-3.4.1.slim.min.js"></script><script src="https://cdn.jsdelivr.net/npm/popper.js@1.16.0/dist/umd/popper.min.js"></script><script src="https://stackpath.bootstrapcdn.com/bootstrap/4.4.1/js/bootstrap.min.js"></script>怎么讓它變成一條直線呢？