arduino language reference nearing completion, properly CC-BY-SA 3.0 attributed

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-.. _arduino-bitwisexornot:
-
-Bitwise NOT (~)
-===============
-
-The bitwise NOT operator in C++ is the tilde character ~. Unlike &
-and \|, the bitwise NOT operator is applied to a single operand to
-its right. Bitwise NOT changes each bit to its opposite: 0 becomes
-1, and 1 becomes 0. For example:
-
-
-
-::
-
-        0  1    operand1
-
-
-
-::
-
-       ----------
-        1  0   ~ operand1
-
-
-
-::
-
-        int a = 103;    // binary:  0000000001100111
-        int b = ~a;     // binary:  1111111110011000 = -104
-
-
-
-You might be surprised to see a negative number like -104 as the
-result of this operation. This is because the highest bit in an int
-variable is the so-called sign bit. If the highest bit is 1, the
-number is interpreted as negative. This encoding of positive and
-negative numbers is referred to as two's complement. For more
-information, see the Wikipedia article on
-`two's complement. <http://en.wikipedia.org/wiki/Twos_complement>`_
-
-
-
-As an aside, it is interesting to note that for any integer x, ~x
-is the same as -x-1.
-
-
-
-At times, the sign bit in a signed integer expression can cause
-some unwanted surprises.
-
-