* Makefile (check_sorted): Further improve quality of checks.

* NEWS: Document this.
* zone1970.tab: Sort country codes better.

Makefile

@@ -487,12 +487,17 @@ check_white_space: $(ENCHILADA)
 		! grep -n '[[:space:]]$$' $(ENCHILADA)
 		! grep -n "$$(printf '[\f\r\v]\n')" $(ENCHILADA)
 
-check_sorted: backward backzone iso3166.tab zone1970.tab
-		$(AWK) '/^Link/ {print $$3}' backward | LC_ALL=C sort -c
-		$(AWK) '/^Zone/ {print $$2}' backzone | LC_ALL=C sort -c
-		$(AWK) '/^[^#]/ {print}' iso3166.tab | LC_ALL=C sort -c
+CHECK_CC_LIST = { n = split($$1,a,/,/); for (i=2; i<=n; i++) print a[1], a[i]; }
+
+check_sorted: backward backzone iso3166.tab zone.tab zone1970.tab
+		$(AWK) '/^Link/ {print $$3}' backward | LC_ALL=C sort -cu
+		$(AWK) '/^Zone/ {print $$2}' backzone | LC_ALL=C sort -cu
+		$(AWK) '/^[^#]/ {print $$1}' iso3166.tab | LC_ALL=C sort -cu
+		$(AWK) '/^[^#]/ {print $$1}' zone.tab | LC_ALL=C sort -c
 		$(AWK) '/^[^#]/ {print substr($$0, 1, 2)}' zone1970.tab | \
 		  LC_ALL=C sort -c
+		$(AWK) '/^[^#]/ $(CHECK_CC_LIST)' zone1970.tab | \
+		  LC_ALL=C sort -cu
 
 check_tables:	checktab.awk $(PRIMARY_YDATA) $(ZONETABLES)
 		for tab in $(ZONETABLES); do \

NEWS

@@ -23,6 +23,10 @@ Unreleased, experimental changes
     An access to uninitalized data has been fixed.
     (Thanks to Jörg Richter for reporting the problem.)
 
+  Changes affecting build procedure
+
+    'make check' now checks better for properly-sorted data.
+
   Changes affecting documentation and commentary
 
     zdump -c's treatment of years is now documented to use the

zone1970.tab

@@ -323,7 +323,7 @@ TM	+3757+05823	Asia/Ashgabat
 TN	+3648+01011	Africa/Tunis
 TO	-2110-17510	Pacific/Tongatapu
 TR	+4101+02858	Europe/Istanbul
-TT,AG,AI,BL,DM,GD,GP,MF,LC,KN,MS,VC,VG,VI	+1039-06131	America/Port_of_Spain
+TT,AG,AI,BL,DM,GD,GP,KN,LC,MF,MS,VC,VG,VI	+1039-06131	America/Port_of_Spain
 TV	-0831+17913	Pacific/Funafuti
 TW	+2503+12130	Asia/Taipei
 UA	+5026+03031	Europe/Kiev	most locations