颜色命令显示对后续文本的副作用

Question

我为 QED 命令引入了颜色，但颜色对后面的文本有副作用。我希望颜色仅限于符号。

\documentclass[a4paper,12pt]{article}

\usepackage{xcolor}

\ExplSyntaxOn

\definecolor{dblue}{RGB}{0,0,139}
\colorlet{celestk}{dblue}

\NewDocumentCommand{\wvQed}{O{celestk}o}
  {
    \IfNoValueTF{#2}{\color{#1}}{\color[#1]{#2}}
    \hfill\nabla
  }

\ExplSyntaxOff

\begin{document}

Tantra is an Expansion Device. \wvQed

The word appears in the hymns of the Rigveda such as in 10.71

\end{document}

Answer 1

expl3除了省去注释行尾的麻烦之外，语法在这里对您没有多大帮助。虽然这很方便，但我不会为此更改类别代码。

您需要$编译它。您需要一个组来限制颜色变化的影响。

\documentclass[a4paper,12pt]{article}

\usepackage{xcolor}

\definecolor{dblue}{RGB}{0,0,139}
\colorlet{celestk}{dblue}

\NewDocumentCommand{\wvQed}{O{celestk}o}
  {%
    \begingroup
      \IfNoValueTF{#2}{\color{#1}}{\color[#1]{#2}}%
      \hfill$\nabla$%
    \endgroup
  }

\begin{document}

Tantra is an Expansion Device. \wvQed

The word appears in the hymns of the Rigveda such as in 10.71

\end{document}