\documentclass[12pt]{report}
\usepackage[utf8x]{inputenc}

%Warning: tipa declares many non-standard macros used by utf8x to
%interpret utf8 characters but extra packages might have to be added
%such as "textgreek" for Greek letters not already in tipa
%or "stmaryrd" for mathematical symbols.
%Utf8 codes missing a LaTeX interpretation can be defined by using
%\DeclareUnicodeCharacter{code}{interpretation}.
%Use coqdoc's option -p to add new packages or declarations.
\usepackage{tipa}

\usepackage[T1]{fontenc}
\usepackage{fullpage}
\usepackage{coqdoc}
\usepackage{amsmath,amssymb}
\usepackage{url}
\begin{document}
\coqlibrary{Coqdoc.bug11194}{Library }{Coqdoc.bug11194}

\begin{coqdoccode}
\coqdocnoindent
\coqdockw{Record} \coqdef{Coqdoc.bug11194.a struct}{a\_struct}{\coqdocrecord{a\_struct}} := \{ \coqdef{Coqdoc.bug11194.anum}{anum}{\coqdocprojection{anum}} : \coqexternalref{nat}{http://coq.inria.fr/stdlib/Coq.Init.Datatypes}{\coqdocinductive{nat}} \}.\coqdoceol
\coqdocnoindent
\coqdockw{Canonical} \coqdockw{Structure} \coqdef{Coqdoc.bug11194.a struct 0}{a\_struct\_0}{\coqdocdefinition{a\_struct\_0}} := \{| \coqref{Coqdoc.bug11194.anum}{\coqdocprojection{anum}} := 0|\}.\coqdoceol
\coqdocnoindent
\coqdockw{Definition} \coqdef{Coqdoc.bug11194.rename a s 0}{rename\_a\_s\_0}{\coqdocdefinition{rename\_a\_s\_0}} := \coqref{Coqdoc.bug11194.a struct 0}{\coqdocdefinition{a\_struct\_0}}.\coqdoceol
\coqdocnoindent
\coqdockw{Coercion} \coqdef{Coqdoc.bug11194.some nat}{some\_nat}{\coqdocdefinition{some\_nat}} := (@\coqexternalref{Some}{http://coq.inria.fr/stdlib/Coq.Init.Datatypes}{\coqdocconstructor{Some}} \coqexternalref{nat}{http://coq.inria.fr/stdlib/Coq.Init.Datatypes}{\coqdocinductive{nat}}).\coqdoceol
\coqdocnoindent
\coqdockw{Definition} \coqdef{Coqdoc.bug11194.rename some nat}{rename\_some\_nat}{\coqdocdefinition{rename\_some\_nat}} := \coqref{Coqdoc.bug11194.some nat}{\coqdocdefinition{some\_nat}}.\coqdoceol
\end{coqdoccode}
\end{document}