[tz] New 'Theory' section "Accuracy of the tz database"

[Paul Eggert]

Thanks for reporting those bugs.  I pushed this
into the experimental version:

>From a48e137422570ce2b52cb495f5c910a87718ff75 Mon Sep 17 00:00:00 2001
From: Paul Eggert <eggert at cs.ucla.edu>
Date: Sun, 15 Sep 2013 18:36:34 -0500
Subject: [PATCH] * Theory: Fix typos noted by Philip Newton

in <http://mm.icann.org/pipermail/tz/2013-September/020197.html>.
---
 Theory | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/Theory b/Theory
index 1c78a46..0b02ddc 100644
--- a/Theory
+++ b/Theory
@@ -284,10 +284,10 @@ Errors in the tz database arise from many sources:
 
  * The tz database does not record the earliest time for which a
    zone's data is thereafter valid for every location in the region.
-   For example, Europe/London is valid for all locations in the its
+   For example, Europe/London is valid for all locations in its
    region after GMT was made the standard time, but the date of
    standardization (1880-08-02) is not in the tz database, other than
-   in commentary.  For many zones the earlist time of validity is
+   in commentary.  For many zones the earliest time of validity is
    unknown.
 
  * The tz database does not record a region's boundaries, and in many
-- 
1.8.3.1