Macros: contain current date, redundant text between book summaries.

macros.ms

@@ -209,3 +209,25 @@ To be defined or to finish.
 .br
 \(->\h'5p' \\$*
 ..
+.ds CURRENT_DATE \\n(dy/\\n(mo/\\n[year]
+.ds WEBSITE      https://t.karchnu.fr/doc
+.ds EMAIL        karchnu@karchnu.fr
+.de INFORMATIONS
+Check out for newer versions:
+.ft CW
+.ps 8
+\h'2p' \\$1
+.ps
+.ft
+.br
+And if you have questions:
+.ft CW
+\h'13p' \\$2
+.ft
+.\" .DE
+
+.LP
+Lastly compiled the
+.SHINE \*[CURRENT_DATE]
+(day/month/year, you know, like in any sane civilization).
+..