maint: describe coreutils' policy on copyright year number ranges

* README: Mention coreutils' long-standing policy on use of M-N
ranges in copyright year lists.  Requested by Richard Stallman.

diff --git a/README b/README
index 3ecafc362bec1e28b2dcd8a883f0061438e9838e..040c7e5ecccae6ed81473bc73be96fc4b44cfd38 100644 (file)
--- a/README
+++ b/README
@@ -223,6 +223,9 @@ For general documentation on the coding and usage standards
 this distribution follows, see the GNU Coding Standards,
 http://www.gnu.org/prep/standards_toc.html.
 
+For any copyright year range specified as YYYY-ZZZZ in this package
+note that the range specifies every single year in that closed interval.
+
 Mail suggestions and bug reports for these programs to
 the address on the last line of --help output.