LaTeX: use older syntax and not the \expanded added at #11234

Sorry about this, the \expanded was added to pdflatex in 2019 only
(but was available earlier to lualatex).  This is in contrast
with \unexpanded which has been available for more than 15 years.

sphinx/texinputs/sphinxlatexadmonitions.sty

@@ -84,19 +84,19 @@
 % as long as the related CSS-named options are not used.
 \newenvironment{sphinxnote}[1]
   {\edef\spx@env{sphinx\ifspx@opt@heavynote heavy\else light\fi box}%
-   \expanded{\noexpand\begin{\spx@env}}\sphinxstrong{#1} }
+   \expandafter\begin\expandafter{\spx@env}\sphinxstrong{#1} }
   {\expandafter\end\expandafter{\spx@env}}
 \newenvironment{sphinxhint}[1]
   {\edef\spx@env{sphinx\ifspx@opt@heavyhint heavy\else light\fi box}%
-   \expanded{\noexpand\begin{\spx@env}}\sphinxstrong{#1} }
+   \expandafter\begin\expandafter{\spx@env}\sphinxstrong{#1} }
   {\expandafter\end\expandafter{\spx@env}}
 \newenvironment{sphinximportant}[1]
   {\edef\spx@env{sphinx\ifspx@opt@heavyimportant heavy\else light\fi box}%
-   \expanded{\noexpand\begin{\spx@env}}\sphinxstrong{#1} }
+   \expandafter\begin\expandafter{\spx@env}\sphinxstrong{#1} }
   {\expandafter\end\expandafter{\spx@env}}
 \newenvironment{sphinxtip}[1]
   {\edef\spx@env{sphinx\ifspx@opt@heavytip heavy\else light\fi box}%
-   \expanded{\noexpand\begin{\spx@env}}\sphinxstrong{#1} }
+   \expandafter\begin\expandafter{\spx@env}\sphinxstrong{#1} }
   {\expandafter\end\expandafter{\spx@env}}
 
 % warning/caution/attention/danger/error  get more distinction
@@ -205,6 +205,6 @@
   % trigger the sphinx<type> environment, #2=heading is passed as argument
   \begin{sphinx#1}{#2}}
   % workaround some LaTeX "feature" of \end command (can't use "sphinx#1" here)
- {\expanded{\noexpand\end{sphinx\spx@noticetype}}}
+  {\edef\spx@temp{\noexpand\end{sphinx\spx@noticetype}}\spx@temp}
 
 \endinput