title: How to interpret [73] at end of an xml2 error message
body: <p>I am using R to parse 60 large (0.5 GB each) XML files from the same source. I have code that works for all file except one, which returns this error message:</p>
  
  <pre><code>Error in doc_parse_file(con, encoding = encoding, as_html = as_html, options = options) : 
    expected '&gt;' [73]
  </code></pre>
  
  <p>This comes from <code>read_xml.character()</code>.</p>
  
  <p>The message is clear that there is a missing character in the file, but to help me find it it would be goo to know: what does the <code>[73]</code> refer to?</p>
  
  <p>(My first guess was line 73 of the file, but there's nothing obviously wrong with that).  </p>
  
  <p>I can't post a reproducible example because of the size of the file and its commercial in confidence; so I'd be happy just with a point on the error message.</p>