[Rd] is R syntax closed?

[Piotr Turski]

hi,

i'm new to R and i discovered that for years people are complaining 
about lacking of very basic and hopefully simple things, like multiline 
comment, some marker for 'command doesn't end at this line' etc.

so my question is why some of those things are still not implemented? is 
it because of compatibility/policy reasons? is R syntax done and any 
extensions are forbidden? or it's simply because everyone is doing 
something more interesting?
if it's the second case then do such pull requests/patches have a chance 
of being accepted?

-- 
regards,
piotrek