[tex-k] TeXbook: typo in answer to exercise 20.7

Igor Liferenko igor.liferenko at gmail.com
Wed May 15 11:30:26 CEST 2019

Hi all,

In TeXbook, answer to exercise 20.7, it is written that TeX says:


But TeX actually says:




Can anybody explain what means the following extract in the answer?

    which is different from {

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