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A \typeout (or expandable command) that can expand once - or with variable levels of expansion?
Consider the following MWE:
\documentclass[12pt]{article}
\begin{document}
\def\aaa{something}
\typeout{=1==\aaa==}
\typeout{=1==\meaning\aaa==}
\typeout{}
\def\bbb{else \aaa, else}
...
