Fix unsigned upper bound [closes #56]
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					@ -77,7 +77,7 @@ of the bit representation, the number will overflow.
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In a signed representation,
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					In a signed representation,
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the next number after $2^{n-1}-1$ is $-2^{n-1}$,
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					the next number after $2^{n-1}-1$ is $-2^{n-1}$,
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and in an unsigned representation,
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					and in an unsigned representation,
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the next number after $2^{n-1}$ is $0$.
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					the next number after $2^n-1$ is $0$.
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For example, consider the following code:
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					For example, consider the following code:
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\begin{lstlisting}
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					\begin{lstlisting}
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int x = 2147483647
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					int x = 2147483647
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