Make provision for block on next line.

[rout39574]

I think this addresses #97 . It makes it possible for there to be syntax-irrelevant chaff between the title of the block and the definition of the block.

before,
'''
path "sys/auth" {
capabilities = ["read"]
}
'''

parsed, but

'''
path "sys/auth"
{
capabilities = ["read"]
}
'''

did not.