german@Debian:~$ cat <<EOF | tidy >pagina.html
> <html>
> <title>test</test>
> <body>
> hola mundo
> </body>
> </html>
> EOF
line 1 column 1 - Warning: missing <!DOCTYPE> declaration
line 2 column 12 - Warning: discarding unexpected </test>
line 2 column 1 - Warning: missing </title> before <body>
Info: Document content looks like HTML 3.2
3 warnings, 0 errors were found!
To learn more about HTML Tidy see http://tidy.sourceforge.net
Please send bug reports to html-tidy@w3.org
HTML and CSS specifications are available from http://www.w3.org/
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german@Debian:~$ cat pagina.html
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 3.2//EN">
<html>
<head>
<meta name="generator" content=
"HTML Tidy for Linux/x86 (vers 1 September 2005), see www.w3.org">
<title>test</title>
</head>
<body>
hola mundo
</body>
</html>
german@Debian:~$