ddoc documentation

[Carlos Santander]

In the section Predefined Macros, the value for DDOC_PARAMS is wrong. It should be

$(B Params:)$(BR)
$(TABLE $0)$(BR)

Instead of the current:

$(TABLE $0)$(BR)$(BR)

Maybe all the definitions should be copied from dmd/doc.c just to be sure?

-- 
Carlos Santander Bernal