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It is only space on paper, not at run time.
And curly braces aren't here for nothing. They are designed for the programmer to use it, for extra checking by programmer AND (important!!) by the system at compile time, to quote Mr. Soustroup.
And space is often (not always) not an issue for the hardcore/professional programmer because they tend to program on at least 19'" monitors (preferably 22" or more). Only if you are stuck with a 15"-er then you are outta luck.
But nevertheless, curly braces do have an important meaning as mentioned before.
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