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+LaTeX package 'ifetex'
+~~~~~~~~~~~~~~~~~~~~~~
+Copyright (c) 2011-2018 by Martin Scharrer <martin@scharrer-online.de>
+CTAN: http://www.ctan.org/pkg/ifetex
+Code repository: https://bitbucket.org/martin_scharrer/ifetex
+Issue tracker: https://bitbucket.org/martin_scharrer/ifetex/issues
+
+This small package provides the if-switch \ifetex which indicated whether
+e-TeX is available or not.
+
+The package can be loaded as LaTeX package using `\usepackage{ifetex}` or in
+plainTeX using `\input ifetex`. In both cases it aborts silently if the \ifetex macro
+is already defined.
+
+The package currently test if \eTeXversion is defined as a primitive and
+assumes e-TeX if so.
+