[PATCH] glossary: fixed typo in "Directory, working" description

[Renato Cunha]

# HG changeset patch
# User Renato Cunha <renatoc at gmail.com>
# Date 1278432616 10800
# Node ID d06ed218681b88869e936ec30e360e8096713936
# Parent  8b452fe4bf506a1a08bbc7e1bac81aceda8f4d10
glossary: fixed typo in "Directory, working" description

The term "Directory, working" referenced a non-existant term named "Parents,
working directory". This patch fixes the typo.

diff --git a/mercurial/help/glossary.txt b/mercurial/help/glossary.txt
--- a/mercurial/help/glossary.txt
+++ b/mercurial/help/glossary.txt
@@ -185,7 +185,7 @@
     Mercurial, that will be recorded in the next commit. The working
     directory initially corresponds to the snapshot at an existing
     changeset, known as the parent of the working directory. See
-    'Parents, working directory'. The state may be modified by changes
+    'Parent, working directory'. The state may be modified by changes
     to the files introduced manually or by a merge. The repository
     metadata exists in the .hg directory inside the working directory.