---
title: "Sample"
output: 
  rmarkdown::html_document
vignette: >
  %\VignetteIndexEntry{Sample}
  %\VignetteEngine{knitr::rmarkdown}
  %\VignetteEncoding{UTF-8}
---

```{r setup, include = FALSE}
knitr::opts_chunk$set(
  collapse = TRUE,
  comment = "#>"
)
```

This is a sample vignette that contains an error which will be detected
by HTML Tidy.

The error is the use of a non-existent tag, "foobar":

<foobar>

Run `example(processConcordance)` to see before and after reports.