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=== \doifnextcharelse ===

When Pragma ADE started using TeX in the late eighties, their first experiences with programming concerned a simple shell around LaTeX. The commands probably used most at Pragma ADE are the itemizing ones. One of those initial shell commands took care of an optional argument, that enabled the specification of the item symbol to be used. Without understanding anything they were able to locate a LaTeX macro that could be used to inspect the next character.