nnheader-numerical-full-files
nnheader-numerical-full-files is a variable defined in `nnheader.el
'.
Its value is "/\\([0-9]+\\)\\(\\.Z\\'\\|\\.bz2\\'\\|\\.tbz2?\\'\\|\\.\\(?:tgz\\|svgz\\|sifz\\)\\'\\|\\.g?z\\'\\|\\.lz\\'\\|\\.lzma\\'\\|\\.xz\\'\\|\\.txz\\'\\|\\.dz\\'\\)?"Documentation: Regexp that matches numerical full file names.