missing_repr=Undefined
missing_iter=[]
loop_missing=[]
loop_empty=[]
attribute='value'/'value'
attribute_missing=True/True
item='zero'/True
item_missing=True
concat='ab'
scope_parent='value'/True
indent_no_blank='head\n    tail'/'head'
join_missing=''
replace_all='b-b'
select_missing=[]
