The two bracets make up an extra namespace

I would avoid calling this a "namespace". The brackets in this example are creating a lexical scope. When someone says "namespace" in Perl, they almost always mean a package.

In reply to Re^2: difference between 'if (condition) { expression;}' and 'expression if (condition)' by revdiablo
in thread difference between 'if (condition) { expression;}' and 'expression if (condition)' by ranjan_jajodia

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