<substitution oldstring="\" newstring="\\"/>
<!-- * escape all dots at the beginnings of lines (because roff -->
<!-- * interprets them as the start of roff requests) -->
- <substitution oldstring=" ." newstring=" \."/>
+ <substitution oldstring=" ." newstring=" \&."/>
<!-- * the stylesheets use U+2302 internally to represent the start of a -->
<!-- * roff request; for output, we need to convert that internal -->
<!-- * representation to the character that roff actually uses to mark -->