--- parse tree ---
[ Code
    "test/typ/regression/issue54.typ"
    ( line 1 , column 2 )
    (Let
       (BasicBind (Just (Identifier "test")))
       (FuncExpr
          [ NormalParam (Identifier "x") , NormalParam (Identifier "y") ]
          (Block
             (CodeBlock
                [ If
                    [ ( Equals (Ident (Identifier "x")) (Ident (Identifier "y"))
                      , Block (Content [ Text "\9989" ])
                      )
                    , ( Literal (Boolean True)
                      , Block
                          (Content
                             [ Text "\10060"
                             , Text "("
                             , Code
                                 "test/typ/regression/issue54.typ"
                                 ( line 1 , column 47 )
                                 (FuncCall
                                    (Ident (Identifier "repr"))
                                    [ NormalArg (Ident (Identifier "x")) ])
                             , Space
                             , Text "/"
                             , Text "="
                             , Space
                             , Code
                                 "test/typ/regression/issue54.typ"
                                 ( line 1 , column 59 )
                                 (FuncCall
                                    (Ident (Identifier "repr"))
                                    [ NormalArg (Ident (Identifier "y")) ])
                             , Text ")"
                             ])
                      )
                    ]
                ]))))
, SoftBreak
, Equation
    True
    [ MAttach
        (Just
           (MGroup
              Nothing
              Nothing
              [ Text "a" , MGroup (Just "(") (Just ")") [ Text "b" ] ]))
        Nothing
        (Text "c")
    , HardBreak
    , MAttach
        (Just (MGroup Nothing Nothing [ Text "a" ])) Nothing (Text "c")
    , MGroup (Just "(") (Just ")") [ Text "b" ]
    , HardBreak
    , MAttach
        (Just (MGroup Nothing Nothing [ Text "a" , Text "!" ]))
        Nothing
        (Text "c")
    , HardBreak
    , MAttach
        (Just (MGroup Nothing Nothing [ Text "a" , Text "!" ]))
        Nothing
        (Text "c")
    , MGroup (Just "(") (Just ")") [ Text "b" ]
    , HardBreak
    , MFrac
        (Text "a")
        (MAttach
           Nothing
           (Just (Text "n"))
           (MGroup Nothing Nothing [ Text "b" , Text "!" ]))
    ]
, ParBreak
]
--- evaluated ---
document(body: { text(body: [
]), 
                 math.equation(block: true, 
                               body: { math.attach(b: { text(body: [a]), 
                                                        math.lr(body: ({ [(], 
                                                                         text(body: [b]), 
                                                                         [)] })) }, 
                                                   base: text(body: [c]), 
                                                   t: none), 
                                       linebreak(), 
                                       math.attach(b: text(body: [a]), 
                                                   base: text(body: [c]), 
                                                   t: none), 
                                       math.lr(body: ({ [(], 
                                                        text(body: [b]), 
                                                        [)] })), 
                                       linebreak(), 
                                       math.attach(b: { text(body: [a]), 
                                                        text(body: [!]) }, 
                                                   base: text(body: [c]), 
                                                   t: none), 
                                       linebreak(), 
                                       math.attach(b: { text(body: [a]), 
                                                        text(body: [!]) }, 
                                                   base: text(body: [c]), 
                                                   t: none), 
                                       math.lr(body: ({ [(], 
                                                        text(body: [b]), 
                                                        [)] })), 
                                       linebreak(), 
                                       math.frac(denom: math.attach(b: none, 
                                                                    base: { text(body: [b]), 
                                                                            text(body: [!]) }, 
                                                                    t: text(body: [n])), 
                                                 num: text(body: [a])) }, 
                               numbering: none), 
                 parbreak() })