附录前的“附录”字母缺失

附录前的“附录”字母缺失

我正在写一份报告,其中各章都有一封信。我有一个自定义文档类 \documentclass[11pt]{tudelft-report},标题的格式如下。附录现在也称为 A | “附录名称”,我更喜欢附录 A | “附录名称”。有人能帮我吗?在此处输入图片描述

\usepackage{titlesec, blindtext, color}
\definecolor{gray75}{gray}{0.75}
\newcommand{\hsp}{\hspace{20pt}}
\titleformat{\chapter}[hang]{\Huge}{\thechapter\hsp\textcolor{gray75}{|}\hsp}{0pt}{\Huge}
\titlespacing*{\chapter}{0pt}{0pt}{2\baselineskip}

\renewcommand\thechapter{\Alph{chapter}}

%% Format the section titles and spacing
\titleformat{\section}
    {\LARGE\titlestyle\bfseries}
    {\thesection}
    {5pt}
    {}
\titlespacing*{\section}{0pt}{\baselineskip}{4pt}

%% Format the subsections titles and spacing
\titleformat{\subsection}
    {\Large\titlestyle\bfseries}
    {\thesubsection}
    {5pt}
    {}
\titlespacing*{\subsection}{0pt}{\baselineskip}{2pt}

%% Format the subsubsections titles and spacing
\titleformat{\subsubsection}
    {\large\titlestyle\bfseries}
    {}
    {0pt}
    {}
\titlespacing*{\subsubsection}{0pt}{\bigskipamount}{0pt}

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