\documentclass{scrbook}
\newcommand{\do}{}
\begin{document}
\renewcommand{\do}{}
\chapter{Wombat}
\renewcommand{\do}{}
\end{document}

├── doc
│   ├── content.tex
│   ├── coseoul_limitations.tex
│   ├── example
│   │   ├── article_fail.tex
│   │   ├── article.tex
│   │   └── octopus
│   │       ├── article.tex
│   │       ├── content.tex
│   │       ├── habitat.tex
│   │       └── lifecycle.tex
│   ├── introduction.tex
│   ├── modular.tex
│   ├── modular_to_the_rescue.tex
│   ├── prerequisites.tex
│   └── README.md
├── modular.sty
└── README.md

$ more /usr/local/texlive/2017/texmf-dist/tex/latex/colortbl/colortbl.sty
%%
%% This is file `colortbl.sty',
%% generated with the docstrip utility.
%%
%% The original source files were:
%%
%% colortbl.dtx  (with options: `package')
%%
%%
%% Source File: `colortbl.dtx'.
%% Copyright 1996 1998 1999 2012 David Carlisle
%%
%% This file may be distributed under the terms of the LPPL.
%% See readme for details.
%%

$ more /home/dpctex/colortbl/README
The colortbl package:

   Add colour to LaTeX tables. Requires array and color packages.
   Process colortbl.ins to produce the package file colortbl.sty.
   Process colortbl.dtx to get the documentation (this requires
   longtable hhline and dcolumn from the standard `tools'
   distribution.)

$ more /home/dpctex/colortbl/colortbl.dtx
% \iffalse
%%
%% Source File: `colortbl.dtx'.
%% Copyright 1996 1998 1999 2012 David Carlisle
%%
%% This file may be distributed under the terms of the LPPL.
%% See readme for details.
%%
%

\submiport*{./doc/}{content.tex}

\let\duckoment\document
\let\endduckoment\enddocument

\documentclass{article}

\begin{duckoment}
Paulo's thesis
\end{duckoment}

\documentclass{minimal}
\begin{document}
P’s th
\end{document}

\documentclass{minimal}
\begin{document}
\end{document}