Prevent non-existent help handbook from populating the main handbook table of contents.

kdevdesigner/src/kdevdesigner.desktop

@@ -58,7 +58,13 @@ GenericName[zh_TW]=介面設計器
 Exec=kdevdesigner %i -caption "%c"
 Icon=kdevdesigner
 Type=Application
-DocPath=kdevdesigner/kdevdesigner.html
+# Restore the following key and remove this comment when a help handbook
+# is written. Disabling this key prevents populating the main handbook
+# table of contents with a non-existent document, which results in a
+# main handbook error message of
+# 'There is no documentation available for /xyz/index.html.'
+# Also disable this key when there exists only a useless template handbook.
+# DocPath=kdevdesigner/kdevdesigner.html
 Comment=GUI Designer for Qt/TDE
 Comment[ca]=Dissenyador de IGU per Qt/TDE
 Comment[da]=Grafisk brugerfladedesigner til Qt/TDE