rules for all user agents

[davidcpell]

Is there an easy way in the DSL to write write rules for all user agents instead. So instead of...

googlebot do
 ...
end

...or...

user_agent[:googlebot, :bingbot] do
... 
end

...is there an equivalent of the hard-coded phrase Use_agent: * that would allow any user agent at the top of robots.txt ?