Add some old test files.

tests/columns.txt

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+12345678901234567890123456789012345678901234567890123456789012345678901234567890
+
+Lorem ipsum dolor sit amet, consectetuer adipiscing elit. Aenean commodo ligula
+e get dolor. Aenean massa. Cum sociis natoque penatibus et magnis dis parturient
+montes, nascetur ridiculus mus. Donec quam felis, ultricies nec, pellentesque
+eu, pretium quis, sem. Nulla consequat massa quis enim. Donec pede justo,
+fringilla vel, aliquet nec, vulputate eget, arcu. In enim justo, rhoncus ut,
+imperdiet a, venenatis vitae, justo. Nullam dictum felis eu pede mollis pretium.
+
+12345678901234567890123456789012345678901234567890123456789012345678901234567890

tests/test.cs

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+// This is a comment.
+// This is another comment.
+public void thing() {
+
+}

tests/test.tex

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+This is a test. This is a test. This is a test. This is a test. % This is a comment
+
+
+
+% Must not omit this very important statement:
+Very important statement
+
+
+We refer the reader to the proof in Lemma~\ref{lem:FLT}
+% Here is some text
+% that I have decided
+% to remove.
+the proof given is particularly elegant because of reasons X,Y,Z...
+
+
+% better for a higher number of surfaces.
+The run-time of the DT method does not depend on the number of surfaces and
+scales well even for a high number of surfaces.
+%
+
+
+\documentclass[12pt]{article}
+\usepackage{amsmath}
+\title{\LaTeX}
+\date{}
+\begin{document}
+  \maketitle
+  \LaTeX{} is a document preparation system for the \TeX{}
+  typesetting program. It offers programmable desktop
+  publishing features and extensive facilities for
+  automating most aspects of typesetting and desktop
+  publishing, including numbering and cross-referencing,
+  tables and figures, page layout, bibliographies, and
+  much more. \LaTeX{} was originally written in 1984 by
+  Leslie Lamport and has become the dominant method for
+  using \TeX; few people write in plain \TeX{} anymore.
+  The current version is \LaTeXe.
+
+  % This is a comment, not shown in final output.
+  % The following shows typesetting power of LaTeX:
+  \begin{align}
+    E_0 &= mc^2                              \\
+    E &= \frac{mc^2}{\sqrt{1-\frac{v^2}{c^2}}}
+  \end{align}
+\end{document}
+
+
+\begin{itemize}
+    \item  $\pi \colon Bl_J M \rightarrow M$ is the blowup along
+the Jacobian ideal $J = (Jac(f), f)$ for $X$.  Note that if we
+wanted to we could have instead used
+$J = (Jac(f,g), f, g) \cdot (Jac(f), f)$; this would give
+us a blowup that factored through both the
+Nash blowup of $Z$, and the blowup that gives us Aluffi's
+formula (which holds under further blowups).  $\X$, ${\cal H}$
+denote the total transforms of $X$ and $H$ under the blowup $Bl_J M$,
+and $E_X$ denotes the exceptional divisor over $X$.  % actually E_X = E_Y = E_Z = E? or not
+jfkldskjfadlksajfklds
+    \item  $i_{X \cap H}^* \pi_* = \pi_* i_{\X \cap {\cal H}}^*$,
+where $i_{\X \cap {\cal H}}^*$ is the transverse intersection map
+for $\X \cap {\cal H}$.
+    \item  $i_{\X \cap {\cal H}}^*[\X]$ is equal to
+$[\X \pitch {\cal H}]$, and this is the same class as $[\Z]$;
+similarly for $i_{\X \cap {\cal H}}^*[E_X]$.
+\end{itemize}
+
+
+Let $X$ and $Y$ be smooth hypersurfaces in a smooth ambient variety $M$,
+where $Z = X \cap Y$ is a smooth global complete intersection and
+$X$ meets $Y$ transversely.  If $\nu_Z$, $\nu_X$, $\nu_Y$ denote the
+normal bundles of $Z$, $X$, and $Y$ in $M$, then the transversality of
+$X$ and $Y$ means that $\nu_Z = \nu_X|_Z \oplus \nu_Y|_Z$.
+Moreover, the Chern class $c(\nu_Z)$ is given by $1 + Z$, where $Z$
+denotes the dual of the fundamental class $[Z]$, {\it i.e.}
+$Z \cap [M] = [Z]$ (and similarly for $c(\nu_X)$ and $c(\nu_Y)$).  % missing inclusions?
+Using these facts we can compute the following formula for the
+MacPherson-Chern class $c_*(Z)$ of $Z$ in terms of $X$ and $Y$:
+
+
+% Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo
+
+
+Lorem ipsum dolor sit amet, consectetur adipisicing elit, % Comment asdf fdsa alskdjf dsfaj fkdljsafkdsj aflkdj salfk jdslkafj jd salkfjd.
+
+Lorem ipsum dolor sit amet, consectetur adipisicing elit, % Comment asdf fdsa
+                                                          % alskdjf dsfaj
+                                                          % fkdljsafkdsj aflkdj
+                                                          % salfk jdslkafj jd
+                                                          % salkfjd.