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    # Pretty printing tests
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    =  -123
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    ## stdout: (Int)   -123
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    = -0.00
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    ## stdout: (Float)   -0.0
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    = null
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    ## stdout: (Null)   null
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    =       true
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    =       false
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    ## STDOUT:
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    (Bool)   true
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    (Bool)   false
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    ## END
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    = "double quoted"
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    = 'single quoted'
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    ## STDOUT:
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    (Str)   'double quoted'
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    (Str)   'single quoted'
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    ## END
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    var x = 1..100
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    pp (x)
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    # TODO: show type here, like (Range 1 .. 100)
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    pp ({k: x})
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    echo
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    remove-addr() {
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      sed 's/0x[0-9a-f]\+/0x---/'
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    }
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    pp line (x) | remove-addr
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    pp line ({k: x}) | remove-addr
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    ## STDOUT:
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    (Range 1 .. 100)
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    (Dict)   {k: (Range 1 .. 100)}
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    <Range 0x--->
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    (Dict)   {"k":<Range 0x--->}
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    ## END
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    var pat = /d+/
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    remove-addr() {
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      sed 's/0x[0-9a-f]\+/0x---/'
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    }
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    pp (pat) | remove-addr
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    pp ({k: pat}) | remove-addr
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    # TODO: change this
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    echo
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    pp line (pat) | remove-addr
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    pp line ({k: pat}) | remove-addr
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    ## STDOUT:
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    <Eggex 0x--->
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    (Dict)   {k: <Eggex 0x--->}
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    <Eggex 0x--->
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    (Dict)   {"k":<Eggex 0x--->}
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    ## END
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    declare -a empty=()
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    declare -a array_1=(hello)
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    pp (empty)
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    pp (array_1)
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    echo
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    pp ({k: empty})
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    pp ({k: array_1})
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    echo
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    pp line (empty)
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    pp line (array_1)
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    echo
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    pp line ({k: empty})
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    pp line ({k: array_1})
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    ## STDOUT:
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    (BashArray)
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    (BashArray 'hello')
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    (Dict)   {k: (BashArray)}
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    (Dict)   {k: (BashArray 'hello')}
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    (BashArray)   []
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    (BashArray)   ["hello"]
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    (Dict)   {"k":[]}
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    (Dict)   {"k":["hello"]}
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    ## END
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    declare -a array_3
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    array_3[0]="world"
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    array_3[2]=*.py
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    declare array_long=(Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed
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    do eiusmod.)
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    = array_3
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    = array_long
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    ## STDOUT:
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    (BashArray 'world' null '*.py')
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    (BashArray
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        'Lorem'       'ipsum'       'dolor'       'sit'         'amet,'
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        'consectetur' 'adipiscing'  'elit,'       'sed'         'do'
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        'eiusmod.'
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    )
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    ## END
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    declare -A empty
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    declare -A assoc=(['k']=$'foo \x01\u03bc')
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    pp (empty)
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    pp (assoc)
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    echo
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    pp ({k:empty})
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    pp ({k:assoc})
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    echo
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    pp line (empty)
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    pp line (assoc)
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    echo
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    pp line ({k:empty})
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    pp line ({k:assoc})
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    ## STDOUT:
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    (BashAssoc)
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    (BashAssoc ['k']=$'foo \u0001μ')
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    (Dict)   {k: (BashAssoc)}
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    (Dict)   {k: (BashAssoc ['k']=$'foo \u0001μ')}
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    (BashAssoc)   {}
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    (BashAssoc)   {"k":"foo \u0001μ"}
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    (Dict)   {"k":{}}
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    (Dict)   {"k":{"k":"foo \u0001μ"}}
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    ## END
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    declare -A assoc_0=()
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    declare -A assoc_1=([1]=one)
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    declare assoc_3=([1]=one [two]=2 [3]=three)
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    declare assoc_long=([Lorem]=ipsum [dolor]="sit amet," ['consectetur adipiscing']="elit, sed" [do]="eiusmod.")
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    = assoc_0
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    = assoc_1
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    = assoc_3
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    = assoc_long
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    ## STDOUT:
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    (BashAssoc)
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    (BashAssoc ['1']='one')
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    (BashAssoc ['1']='one' ['two']='2' ['3']='three')
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    (BashAssoc
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        ['Lorem']='ipsum'
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        ['dolor']='sit amet,'
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        ['consectetur adipiscing']='elit, sed'
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        ['do']='eiusmod.'
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    )
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    ## END
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    var cyclic_array = ["one", "two", "three"]
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    setvar cyclic_array[2] = cyclic_array
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    var cyclic_dict = {"dead_end": null}
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    setvar cyclic_dict["live_end"] = cyclic_dict
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    = cyclic_array
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    = cyclic_dict
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    ## STDOUT:
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    (List)   ['one', 'two', [...]]
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    (Dict)   {dead_end: null, live_end: {...}}
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    ## END
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    var dict = {}
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    setvar dict["nothing"] = null
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    var simple_cycle = [["dummy"]]
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    setvar simple_cycle[0][0] = simple_cycle
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    setvar dict["simple_cycle"] = simple_cycle
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    var tricky_cycle = ["dummy"]
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    setvar tricky_cycle[0] = dict
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    setvar dict["tricky_cycle"] = tricky_cycle
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    var dag = [1, 2, "dummy"]
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    setvar dag[2] = dag
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    setvar dict["dag"] = [dag, dag]
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    var alpha = {}
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    var omega = {}
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    setvar alpha["omega"] = omega
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    setvar omega["alpha"] = alpha
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    setvar dict["key_alpha"] = alpha
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    setvar dict["key_omega"] = omega
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    = dict
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    ## STDOUT:
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    (Dict)
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    {
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        nothing: null,
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        simple_cycle: [[[...]]],
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        tricky_cycle: [{...}],
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        dag: [[1, 2, [...]], [1, 2, [...]]],
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        key_alpha: {omega: {alpha: {...}}},
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        key_omega: {alpha: {omega: {...}}}
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    }
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    ## END
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