[kde-doc-english] [khelpcenter] doc: docs: add missing ids, avoid duplicates

[Aleix Pol]

Git commit e6d015565cdb67b439abc20ab419e9b178b4537d by Aleix Pol, on behalf of Luigi Toscano.
Committed on 23/10/2012 at 00:17.
Pushed by apol into branch 'master'.

docs: add missing ids, avoid duplicates

This commits combines the effect of the following commits
from KDE/4.9:

26195cffd560f046a5ea0b98a7edecb56f38ca9a
17fc976ca4eb29f56b8c61667d714b287cec97a2 (*)
730cd2f83c7847f030464ae003e3eded8fb1cb02
bcb962e2460376623d710c8be3d116dc11a2ed45 (*)
09388c4e5cb97fb33604c4c273aa359863082ba5

where (*) marks partial or total reverts; cherry-picking each single
commit would have introduced more noise in this branch

M  +1    -1    doc/index.docbook

http://commits.kde.org/khelpcenter/e6d015565cdb67b439abc20ab419e9b178b4537d

diff --git a/doc/index.docbook b/doc/index.docbook
index d960269..da13e52 100644
--- a/doc/index.docbook
+++ b/doc/index.docbook
@@ -6,7 +6,7 @@
   <!ENTITY % addindex "IGNORE">
 ]>
 
-<book lang="&language;">
+<book id="khelpcenter" lang="&language;">
 <bookinfo>
 <title>The &khelpcenter;</title>
 <authorgroup>