replaced Document.Node_Text_Edit by Document.Text_Edit, with treatment of deleted nodes;
Document_Model.pending_edits: more robust treatment of init, including buffer reload event (jEdit 4.3.2 produces malformed remove/insert that lacks the last character);
tuned;
%%
%% hyperref setup -- special version for Isabelle documentation
%%
\usepackage{ifpdf}
\usepackage{color}
\definecolor{linkcolor}{rgb}{0,0,0}
\usepackage[colorlinks=true,linkcolor=linkcolor,citecolor=linkcolor,filecolor=linkcolor,pagecolor=linkcolor,urlcolor=linkcolor,pdfpagelabels]{hyperref}
\newcommand{\hfootref}[2]{\href{#1}{#2}\footnote{\url{#1}}}
\gdef\fnote#1{\hyperpage{#1}n}
\gdef\bold#1{\textbf{\hyperpage{#1}}}
\urlstyle{rm}
\ifpdf\relax\else\renewcommand{\url}[1]{\nolinkurl{#1}}\fi
\def\isaliteral#1#2{#2}
\def\isanil{}
\ifpdf
\ifnum\pdfminorversion<5\pdfminorversion=5\fi
\renewcommand{\isaliteral}[2]{%
\pdfliteral direct{/Span <</ActualText<#1>>> BDC}#2\pdfliteral direct{EMC}}
\renewcommand{\isanil}{{\color{white}.}}
\fi