[texhax] Question about cwebmac.tex

[Igor Liferenko]

Hi all,

Following are three occurrences of using \pdfoutline in cwebmac.tex

    \pdfoutline goto name {NOS} count -\secno {\outsecname}

    \pdfoutline goto num \the\toksA \expandafter{\the\toksE}}

    \pdfoutline goto num #3 count -\expnumber{chunk#2.#3} {#5}}}

Why \expandafter is used in the second case specifically (in
comparison with other cases)?

Regards,
Igor