LaTeX: fix #10650 via usage of our own sophisticated \fcolorbox

sphinx/texinputs/sphinxlatexadmonitions.sty

@@ -66,6 +66,27 @@
 \definecolor{sphinxtipBgColor}{rgb}{1,1,1}
 
 % Others get more distinction
+\def\spx@admonitions@boxes@fcolorbox@init{%
+  \spx@boxes@border@top   \FrameRule
+  \spx@boxes@border@right \FrameRule
+  \spx@boxes@border@bottom\FrameRule
+  \spx@boxes@border@left  \FrameRule
+  %
+  \spx@boxes@padding@top   \FrameSep
+  \spx@boxes@padding@right \FrameSep
+  \spx@boxes@padding@bottom\FrameSep
+  \spx@boxes@padding@left  \FrameSep
+  %
+  \spx@boxes@shadow@xoffset\sphinxshadowsize
+  \spx@boxes@shadow@yoffset\sphinxshadowsize
+  %
+  \spx@boxes@noshadowtrue     % no shadow
+  \spx@boxes@noshadowcolortrue
+  \spx@boxes@nobackgroundcolorfalse
+  \sphinxcolorlet{spx@boxes@backgroundcolor}{spx@notice@bgcolor}%
+  \spx@boxes@nobordercolorfalse
+  \sphinxcolorlet{spx@boxes@bordercolor}{spx@notice@bordercolor}%
+}%
 % Code adapted from framed.sty's "snugshade" environment.
 % Nesting works (inner frames do not allow page breaks).
 \newenvironment{sphinxheavybox}{\par
@@ -80,10 +101,14 @@
    % revert a skip done by framed before the frame.
     \ltx@ifundefined{OuterFrameSep}{}{\OuterFrameSep\z@skip}%
     \vspace{\FrameHeightAdjust}
+   % this will in particular set up colors, formerly passed as first
+   % two arguments of \fcolorbox
+   \let\spx@boxes@fcolorbox@init\spx@admonitions@boxes@fcolorbox@init
    % copied/adapted from framed.sty's snugshade
+   % but now using in place of \fcolorbox the Sphinx sophisticated own
    \def\FrameCommand##1{\hskip\@totalleftmargin
        \fboxsep\FrameSep \fboxrule\FrameRule
-       \fcolorbox{spx@notice@bordercolor}{spx@notice@bgcolor}{##1}%
+       \spx@boxes@fcolorbox{##1}%
        \hskip-\linewidth \hskip-\@totalleftmargin \hskip\columnwidth}%
    \savenotes
    % use a minipage if we are already inside a framed environment