Tips on how to use let blocks to shadow local variables and avoid accidentally modifying the original variable

[fatteneder]

@HanD

gobal_value = let _ = 0, # dummy assignment to "carry" the comma and the line break
    x = <expression-to-compute-x>, # note the comma
    y = <expression-to-compute-y>  # note the missing comma
    # intentional blank line to separate the body from the declarations
    <expression-using-x-and-y>
end

What is wrong with just using

gobal_value = let x, y
    x = <expression-to-compute-x>
    y = <expression-to-compute-y>
    <expression-using-x-and-y>
end