Allow paren expressions in if, etc (take two)
#12
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The previous implementation #10 was flawed.
This should be much more robust, and doesn't require any syntax adjustments/compromises. It also checks for matching parens. Unfortunately it makes parsing
if (a little slower.This also changes the JS semantics of do-while to enforce a semicolon or newline after the while condition, regardless of whether parens are used.