--- parse tree ---
[ Comment
, SoftBreak
, Code
    "typ/text/features-04.typ"
    ( line 2 , column 2 )
    (Set
       (Ident (Identifier "text"))
       [ KeyValArg
           (Identifier "number-type") (Literal (String "old-style"))
       ])
, SoftBreak
, Text "0123456789"
, Space
, HardBreak
, Code
    "typ/text/features-04.typ"
    ( line 4 , column 2 )
    (FuncCall
       (Ident (Identifier "text"))
       [ KeyValArg (Identifier "number-type") (Literal Auto)
       , BlockArg [ Text "0123456789" ]
       ])
, ParBreak
]
--- evaluated ---
document(body: { text(body: [
]), 
                 text(body: [
0123456789 ], 
                      number-type: "old-style"), 
                 linebreak(), 
                 text(body: text(body: [0123456789], 
                                 number-type: "old-style"), 
                      number-type: auto), 
                 parbreak() })
