clarified NEWS: document_files are officially required since Isabelle2014, but the absence was tolerated as legacy feature;
\documentclass[12pt,a4paper,fleqn]{report}
\usepackage[T1]{fontenc}
\usepackage{amssymb}
\usepackage{wasysym}
\usepackage{eurosym}
\usepackage[english]{babel}
\usepackage[only,bigsqcap]{stmaryrd}
\usepackage{textcomp}
\usepackage{latexsym}
\usepackage{graphicx}
\let\intorig=\int %iman.sty redefines \int
\usepackage{iman,extra,isar,proof}
\usepackage[nohyphen,strings]{underscore}
\usepackage{isabelle}
\usepackage{isabellesym}
\usepackage{railsetup}
\usepackage{ttbox}
\usepackage{supertabular}
\usepackage{style}
\usepackage{pdfsetup}
\hyphenation{Isabelle}
\hyphenation{Isar}
\isadroptag{theory}
\title{\includegraphics[scale=0.5]{isabelle_isar} \\[4ex] The Isabelle/Isar Reference Manual}
\author{\emph{Makarius Wenzel} \\[3ex]
With Contributions by
Clemens Ballarin,
Stefan Berghofer, \\
Jasmin Blanchette,
Timothy Bourke,
Lukas Bulwahn, \\
Amine Chaieb,
Lucas Dixon,
Florian Haftmann, \\
Brian Huffman,
Lars Hupel,
Gerwin Klein, \\
Alexander Krauss,
Ond\v{r}ej Kun\v{c}ar,
Andreas Lochbihler, \\
Tobias Nipkow,
Lars Noschinski,
David von Oheimb, \\
Larry Paulson,
Sebastian Skalberg,
Christian Sternagel
}
\makeindex
\chardef\charbackquote=`\`
\newcommand{\backquote}{\mbox{\tt\charbackquote}}
\begin{document}
\maketitle
\pagenumbering{roman}
\chapter*{Preface}
\input{Preface.tex}
\tableofcontents
\clearfirst
\part{Basic Concepts}
\input{Synopsis.tex}
\input{Framework.tex}
\input{First_Order_Logic.tex}
\part{General Language Elements}
\input{Outer_Syntax.tex}
\input{Document_Preparation.tex}
\input{Spec.tex}
\input{Proof.tex}
\input{Inner_Syntax.tex}
\input{Misc.tex}
\input{Generic.tex}
\part{Isabelle/HOL}\label{part:hol}
\input{HOL_Specific.tex}
\part{Appendix}
\appendix
\input{Quick_Reference.tex}
\let\int\intorig
\input{Symbols.tex}
\input{ML_Tactic.tex}
\begingroup
\tocentry{\bibname}
\bibliographystyle{abbrv} \small\raggedright\frenchspacing
\bibliography{manual}
\endgroup
\tocentry{\indexname}
\printindex
\end{document}