gecko/security/nss/doc
..
html
nroff
.hgignore
certutil.xml
cmsutil.xml
crlutil.xml
derdump.xml
Makefile
modutil.xml
pk12util.xml
pp.xml
README
signtool.xml
signver.xml
ssltap.xml
vfychain.xml
vfyserv.xml

A convenient tool to edit these files is
  https://sourceforge.net/projects/xml-copy-editor/

Assuming the documentation text will remain plain US-ASCII,
please disable the option
  "Save UTF-8 byte order mark".