Wie ändere ich den Zeilenabstand nur innerhalb von Listen?

Question

Wenn ich Folgendes mache:

\documentclass{article}
\usepackage[T1]{fontenc}
\usepackage{setspace}
\usepackage{enumitem}
\setstretch{2}
\setlist[itemize]{topsep=.1em,itemsep=.1em,parsep=0em,partopsep=0em}
\setlist*[itemize]{first=\setstretch{1}}    % This undesirably affects the spacing before the list

\begin{document}

\def\text{test paragraph test paragraph test paragraph test paragraph test paragraph test paragraph test paragraph test paragraph test paragraph test paragraph test paragraph test paragraph test paragraph test paragraph test paragraph test paragraph test paragraph test paragraph test paragraph test paragraph test paragraph test paragraph test paragraph test paragraph test paragraph test paragraph}

\text

\begin{itemize}
\item one
\item two
\item three
\end{itemize}

\text

\end{document}

Dann bekomme ich:

Aber das ist nicht, was ich will. Ich möchte den Abstand direkt vor der Liste unverändert lassen, aber nur den Abstand zwischen den Zeilen der Liste ändern. Gibt es eine Möglichkeit, dies automatisch für alle Aufzählungslisten zu erreichen, unabhängig vom Zeilenabstand des umgebenden Textes?

Answer 1

Eine Möglichkeit besteht darin, sich einfach an die geänderte Basislinie anzupassen:

\documentclass{article}
\usepackage[T1]{fontenc}
\usepackage{setspace}
\usepackage{enumitem}
\setstretch{2}
\setlist[itemize]{topsep=.1em,itemsep=.1em,parsep=0em,partopsep=0em}
\setlist*[itemize]{first=\vspace{\baselineskip}\setstretch{1}\vspace{-\baselineskip}}    % This undesirably affects the spacing before the list

\begin{document}

\def\text{test paragraph test paragraph test paragraph test paragraph test paragraph test paragraph test paragraph test paragraph test paragraph test paragraph test paragraph test paragraph test paragraph test paragraph test paragraph test paragraph test paragraph test paragraph test paragraph test paragraph test paragraph test paragraph test paragraph test paragraph test paragraph test paragraph}

\text

\begin{itemize}
\item one
\item two
\item three
\end{itemize}

\text

\end{document}

Answer 2

Wie wäre es damit, die Tasten beforeund zu verwenden after?

    \documentclass{article}
    \usepackage[T1]{fontenc}
    \usepackage{setspace}
    \usepackage{enumitem}
    \setstretch{2}
    \setlist[itemize]{topsep=.1em, itemsep=.1em,parsep=0em, partopsep=0em}
    \setlist[itemize]{before=\begin{singlespace}, after=\end{singlespace}}

    \begin{document}

    \def\text{test paragraph test paragraph test paragraph test paragraph test paragraph test paragraph test paragraph test paragraph test paragraph test paragraph test paragraph test paragraph test paragraph test paragraph test paragraph test paragraph test paragraph test paragraph test paragraph test paragraph test paragraph test paragraph test paragraph test paragraph test paragraph test paragraph}

    \text

    \begin{itemize}
    \item one\text
    \item two
    \item three
    \end{itemize}

    \text

    \end{document} 

Answer 3

Nachdem ein Kommentator vorgeschlagen hatte \singlespacing, habe ich mir die Definition angesehen und denke, dass Folgendes in allen Fällen funktioniert:

\documentclass{article}
\usepackage[T1]{fontenc}
\usepackage{setspace}
\usepackage{enumitem}
\setstretch{2}
\setlist[itemize,enumerate]{topsep=.1em,itemsep=.1em,parsep=0em,partopsep=0em}
\setlist*[itemize,enumerate]{first=\vskip\baselineskip\setstretch{1.1}\vspace{-\baselineskip}}

\begin{document}

\def\text{test paragraph test paragraph test paragraph test paragraph test paragraph test paragraph test paragraph test paragraph test paragraph test paragraph test paragraph test paragraph test paragraph test paragraph test paragraph test paragraph test paragraph test paragraph test paragraph test paragraph test paragraph test paragraph test paragraph test paragraph test paragraph test paragraph}

\text

\begin{itemize}
\item one
\item two
\item three
    \begin{enumerate}
    \item a
    \item b
    \end{enumerate}
\item four
\end{itemize}

\text

\end{document}

Das 1.1kann man natürlich beliebig verändern. Es ergibt sich: