From fd046bc46030912079ef1f5cf0dd97b3514e8dae Mon Sep 17 00:00:00 2001
From: Indrajit Raychaudhuri <irc@indrajit.com>
Date: Thu, 22 Jun 2017 01:43:52 -0500
Subject: [PATCH] Honor whitelist exclusion only for domain or subdomain match

* Whitelisting `s.youtube.com` should not whitelist `ads.youtube.com`; but
  can whitelist `a.s.youtube.com`
* Whitelisting `twitter.com` should not whitelist `ttwitter.com` or
  `twitter.com.au`; but can whitelist `a.twitter.com`
---
 updateHostsFile.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/updateHostsFile.py b/updateHostsFile.py
index 59c9b6d61..27d5b0962 100644
--- a/updateHostsFile.py
+++ b/updateHostsFile.py
@@ -471,7 +471,7 @@ def remove_dups_and_excl(merge_file):
         # Normalize rule
         hostname, normalized_rule = normalize_rule(stripped_rule)
         for exclude in exclusions:
-            if exclude in line:
+            if re.search('[\s\.]' + re.escape(exclude) + '\s', line):
                 write_line = False
                 break