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No, do not count it.
This may seem counter-intuitive at first glance, but it is in fact consistent with how we count bytes.
We don't count separators in other languages.
def f(x):return 2*x
is counted as 19 bytes in Python,
f()(echo $[2*$1])
is counted as 17 bytes in Bash, and
f(x)=2x
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