Merge branch 'iris_style_improvements' into 'master'

Make Hoare triple tex macro compatible with e.g. array environment

See merge request iris/iris!797

tex/iris.sty

@@ -332,8 +332,24 @@
 
 %% Hoare Triples
 
-% needs extra {...} for some weird reason
-\newcommand{\curlybracket}[1]{{\left\{#1\right\}}}
+\newcommand*{\hoaresizebox}[1]{%
+  \hbox{$\mathsurround=0pt{#1}\mathstrut$}}
+\newcommand*{\hoarescalebox}[2]{%
+  \hbox{\scalerel*[1ex]{#1}{#2}}}
+\newcommand{\triple}[5]{%
+  \setbox0=\hoaresizebox{{#3}{#5}}%
+  \setbox1=\hoarescalebox{#1}{\copy0}%
+  \setbox2=\hoarescalebox{#2}{\copy0}%
+  \copy1{#3}\copy2%
+  \; #4 \;%
+  \copy1{#5}\copy2}
+
+\newcommand{\irisbracketgen}[4][]{%
+  \setbox0=\hbox{$\mathsurround=0pt{#1}{#4}\mathstrut$}%
+  \scalerel*[1ex]{#2}{\copy0}%
+  {#4}%
+  \scalerel*[1ex]{#3}{\copy0}}
+\newcommand{\curlybracket}[2][]{\irisbracketgen[{#1}]\{\}{#2}}
 
 \NewDocumentCommand \hoare {m m m O{}}{
 	\curlybracket{#1}\spac #2 \spac \curlybracket{#3}_{#4}%