HG Searching
                                    ************

This is helpful to find out if a current filter is valid or find out why it was added. Good for searching for current DIV
elements are still active.


Lets pick a http://fanboy.co.nz/adblock/forums/viewtopic.php?f=6&t=2542 for example,

hg grep --all -f activewin.com fanboy-adblocklist-current-expanded.txt

Which give us the following results

fanboy-adblocklist-current-expanded.txt:7009:-:activewin.com###table3
fanboy-adblocklist-current-expanded.txt:7009:+:activewin.com##[width="720"][height="90"]
...

Now from the "7009", we can pin point the changeset,

hg log | grep 7009:
changeset:   7009:d4d7b4694891

So what does this give us?

hg log -pr 7009:d4d7b4694891

mdew@mdew-desktop:~/ff/adblock/fanboy-adblock-list$ hg log -pr 7009:d4d7b4694891
changeset:   7009:d4d7b4694891
user:        mp3geek@gmail.com
date:        Mon May 17 20:52:25 2010 +1200
files:       fanboy-adblocklist-current-expanded.txt
description:
site: http://www.activewin.com/mac/content/articles.shtml


diff -r 5833dbefd8fb -r d4d7b4694891 fanboy-adblocklist-current-expanded.txt
--- a/fanboy-adblocklist-current-expanded.txt	Mon May 17 20:50:14 2010 +1200
+++ b/fanboy-adblocklist-current-expanded.txt	Mon May 17 20:52:25 2010 +1200
@@ -1,5 +1,5 @@
 [Adblock Plus 1.1]
-! Checksum: eat/hpqfpLt4XjScUdyPiA
+! Checksum: Vb1weLsNvAJ362oGLB5JvQ
 ! Fanboy's Adblock list
 ! Version: 023B Updated: 17 May 2010
 ! This list expires after 4 days
@@ -4324,7 +4324,7 @@
 achieve360points.com###a1
 achieve360points.com###a3
 achieve360points.com###foot
-activewin.com###table3
+activewin.com##[width="720"][height="90"]
 addictinggames.com###game-info-ad
 addictinggames.com###potw
 addictivetips.com###top-area

Or basically this changeset: http://code.google.com/p/fanboy-adblock-list/source/detail?r=d4d7b46948 so you find out, 
the reason why it was added/removed. Yes its a bit of a mission, but also very powerful as its parses all changes, 
really old historic changes.