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Changes for version 2.006006 - 2019-10-01

change quotify to use longest form of floating point numbers if unable to find a perfectly accurate representation
updated documentation for quotify to reflect handling of floating point numbers
don't try to copy hints hash entries that look like references (RT#122698)

additional fixes for quotify for floating point numbers to be faster and should always be able to maintain accuracy

change quotify of NaNs to simpler calculation
avoid ever triggering exceptions when testing for quotify on false values
skip quotify Inf and NaN tests if perl is compiled without support for them
fix quotify of very large or very small numbers
fix accuracy of quotify on high precision numbers when perl is compiled with quadmath
quotify will use hex floats when needed for full accuracy if they are available
change tests of quotify for floating point numbers to allow a small amount of inaccuracy, since decimal floats can't always be accurate

Defer generation of subroutines until they are first called

Efficient generation of subroutines via string eval

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