[whatwg] Minor Error in Event Stream Format pseudo-BNF

[Lachlan Hunt]

The pseudo-BNF description for the server sent events stream contains 
the following:

   <event>   ::= [ <comment> | <command> | <field> ]* <newline>

   <special> ::= ':' <data> <newline>

I assume <special> should be <command> instead.

http://whatwg.org/specs/web-apps/current-work/#the-event

-- 
Lachlan Hunt
http://lachy.id.au/