made su[bp]/isu[bp] behave the same as their bsu[bp]..esu[bp] counterparts,
properly respect isastylescript now

--- a/lib/texinputs/isabelle.sty	Fri Jun 24 01:09:16 2005 +0200
+++ b/lib/texinputs/isabelle.sty	Fri Jun 24 03:16:52 2005 +0200
@@ -22,10 +22,10 @@
 \newcommand{\isamath}[1]{\emph{$#1$}}
 \newcommand{\isatext}[1]{\emph{#1}}
 \newcommand{\isascriptstyle}{\def\isamath##1{##1}\def\isatext##1{\mbox{\isastylescript##1}}}
-\newcommand{\isactrlsub}[1]{\emph{\isascriptstyle${}\sb{#1}$}}
-\newcommand{\isactrlsup}[1]{\emph{\isascriptstyle${}\sp{#1}$}}
-\newcommand{\isactrlisub}[1]{\emph{\isascriptstyle${}\sb{#1}$}}
-\newcommand{\isactrlisup}[1]{\emph{\isascriptstyle${}\sp{#1}$}}
+\newcommand{\isactrlsub}[1]{\emph{${}\sb{\mbox{\isastylescript{#1}}}$}}
+\newcommand{\isactrlsup}[1]{\emph{${}\sp{\mbox{\isastylescript{#1}}}$}}
+\newcommand{\isactrlisub}[1]{\emph{${}\sb{\mbox{\isastylescript{#1}}}$}}
+\newcommand{\isactrlisup}[1]{\emph{${}\sp{\mbox{\isastylescript{#1}}}$}}
 \newcommand{\isactrlbsub}{\emph\bgroup\begin{math}{}\sb\bgroup\mbox\bgroup\isastylescript}
 \newcommand{\isactrlesub}{\egroup\egroup\end{math}\egroup}
 \newcommand{\isactrlbsup}{\emph\bgroup\begin{math}{}\sp\bgroup\mbox\bgroup\isastylescript}