Macro check for `[:digit:]x` triggers on citations e.g., `2019xfd`. ``` ERROR (Misc) Forbidden pattern: '\d\s*(x|X)'. Use '\x{}' intro.tex:10: programming effort and results in buggy program~\cite{liu2021pmfuz, liu2019xfd}. ```
Macro check for
[:digit:]xtriggers on citations e.g.,2019xfd.