desc: 2399 literal terms not removed under certain circumstances
table_variable_name: t
tests:
    - rb: t.insert({})
    - rb: t.update({:a => {:b => r.literal({})}})
    - rb: t.without('id').coerce_to("ARRAY")
      ot: [{'a':{'b':{}}}]
    - rb: t.delete()

    - rb: t.insert({})
    - rb: t.update({:a => {:b => r.literal()}})
    - rb: t.without('id').coerce_to("ARRAY")
      ot: [{'a': {}}]
    - rb: t.delete()

    - rb: t.insert({})
    - rb: t.update({:a => {:b => {:c => {:d => r.literal({})}}}})
    - rb: t.without('id').coerce_to("ARRAY")
      ot: [{'a':{'b':{'c':{'d':{}}}}}]
    - rb: t.delete()

    - rb: t.insert({})
    - rb: t.update({:a => {:b => [[[{:c => r.literal({})}]]]}})
    - rb: t.without('id').coerce_to("ARRAY")
      ot: [{'a':{'b':[[[{'c':{}}]]]}}]
    - rb: t.delete()

    - rb: t.insert({})
    - rb: t.update({:a => {:b => [r.literal()]}})
    - rb: t.without('id').coerce_to("ARRAY")
      ot: [{'a':{'b':[]}}]
    - rb: t.delete()

    - rb: t.insert({})
    - rb: t.update({:a => {:b => {:a => 'A', :b => 'B', :c => 'C', :cc => r.literal(), :d => 'D'}}})
    - rb: t.without('id').coerce_to("ARRAY")
      ot: [{'a':{'b':{'a':'A', 'b':'B', 'c':'C', 'd':'D'}}}]
    - rb: t.delete()

    - rb: t.insert({})
    - rb: t.update({:a => {:b => {:a => 'A', :b => 'B', :c => 'C', :cc => r.literal('CC'), :d => 'D'}}})
    - rb: t.without('id').coerce_to("ARRAY")
      ot: [{'a':{'b':{'a':'A', 'b':'B', 'c':'C', 'cc':'CC', 'd':'D'}}}]
    - rb: t.delete()