Disclaimer: this bug has been filed in a semi-automated manner.
When emerging the package kde-base/kate-4.8.5, the following elog messages are displayed:
* File templates plugin requires kde-base/kaddressbook:4.
* Please install it if you plan to use this plugin.
Such messages should only be displayed when the package is a new install.
These situations can be checked in the ebuild as follows:
if ! has_version 'kde-base/kate'; then
See the tracker bug 440214 for more details.
Has nothing to do with whether package is new install.