[tz] No Virgin Islands Data

[Paul Eggert]

Alan Barrett wrote:
> However, it might be useful if the "southamerica" also contained
> comments giving the country names and a rationale for the "Link" lines.

Thanks for the suggestion.  I pushed the attached patch.
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From b69ac5849b8dfcce8b237411267abc51863668b6 Mon Sep 17 00:00:00 2001
From: Paul Eggert <eggert at cs.ucla.edu>
Date: Fri, 7 Mar 2014 22:35:28 -0800
Subject: [PATCH] Improve commentary for Trinidad and Tobago's links.

* southamerica (America/Port_of_Spain): Add commentary for links.
* NEWS: Document this.
---
 NEWS         | 3 +++
 southamerica | 9 +++++----
 2 files changed, 8 insertions(+), 4 deletions(-)

diff --git a/NEWS b/NEWS
index fdbb5c2..593ba15 100644
--- a/NEWS
+++ b/NEWS
@@ -38,6 +38,9 @@ Unreleased, experimental changes
 
     Paraguay's 2014 DST will be as predicted.  (Thanks to Carlos Raul Perasso.)
 
+    Better descriptions of countries with same time zone history as
+    Trinidad and Tobago since 1970.  (Thanks to Alan Barrett for suggestion.)
+
     Several changes affect tz-link.htm, the main web page.
 
       Mention xCal (Internet RFC 6321) and jCal.
diff --git a/southamerica b/southamerica
index 21a9da8..5391055 100644
--- a/southamerica
+++ b/southamerica
@@ -1676,18 +1676,19 @@ Zone America/Paramaribo	-3:40:40 -	LMT	1911
 Zone America/Port_of_Spain -4:06:04 -	LMT	1912 Mar 2
 			-4:00	-	AST
 
+# These all agree with Trinidad and Tobago since 1970.
 Link America/Port_of_Spain America/Anguilla
 Link America/Port_of_Spain America/Dominica
 Link America/Port_of_Spain America/Grenada
 Link America/Port_of_Spain America/Guadeloupe
-Link America/Port_of_Spain America/Marigot
+Link America/Port_of_Spain America/Marigot	# St Martin (French part)
 Link America/Port_of_Spain America/Montserrat
 Link America/Port_of_Spain America/St_Barthelemy
-Link America/Port_of_Spain America/St_Kitts
+Link America/Port_of_Spain America/St_Kitts	# St Kitts & Nevis
 Link America/Port_of_Spain America/St_Lucia
-Link America/Port_of_Spain America/St_Thomas
+Link America/Port_of_Spain America/St_Thomas	# Virgin Islands (US)
 Link America/Port_of_Spain America/St_Vincent
-Link America/Port_of_Spain America/Tortola
+Link America/Port_of_Spain America/Tortola	# Virgin Islands (UK)
 
 # Uruguay
 # From Paul Eggert (1993-11-18):
-- 
1.8.3.2