Duplicate base css definitions in stylesheets
All pages carry the following inlined css declaration:
<style>pre{white-space:pre-wrap}*{font-size:100%;font-family:monospace}</style>
However, site security policies may deliberately prohibit execution of
inline content such as scripts and stylesheets as an extra layer of
protection against XSS vulnerabilities. For example, with the following
HTTP headers returned by the server, the inline styles above will be
ignored:
Content-Security-Policy: default-src 'self'
This causes public-inbox content to be rendered poorly on mobile devices
due to the default <pre> behaviour. Duplicating this declaration into
the contrib stylesheets makes sure that these styles are applied even
with the strictest security policies in place.
Signed-off-by: Konstantin Ryabitsev <konstantin@linuxfoundation.org>