+year=`exec date +%Y`
+printf %s "Checking that copyright in documentation contains 2009-$year... "
+# Read the value of variable `copyright' defined in 'doc/conf.py'.
+copyrightline=$(grep ^copyright doc/conf.py)
+case $copyrightline in
+ *2009-$year*)
+ echo Yes. ;;
+ *)
+ echo No.
+ append_emsg "The copyright in doc/conf.py line '$copyrightline' does not contain '2009-$year'"
+esac
+