character changed in article title line

[Chen Xu]

Dear All,

I use FreeBSD document infrastructure to build my own doc, my system is
10.1 release. The document building is fine and it looks good on local
computer. However, when I transferred files to web-server, it looks
differently. To be more specific, the article section title has extra
"<?>".  I checked html files on local and remote server. It appears that
the character "|" becomes "<?>". 

On local computer viewed by a web browser point to 

file://local-dir/article.html

It has 

1. First Section title

On web server, I got this:

1. <?>First Section Title

Any ideas? 

-Chen