ekeyword does not work with multi-line KEYWORDS. Would be great have some check on repoman side.
I'm thinking rather than add an additional test to the keywords check. We instead make a generic multi-line check that we can scan the list of variables to check are not multi-line. That way it will better fit the stage3 re-write intentions and make it easily configurable when those config files are in the repo /metadata/repoman/ dir.
repoman support has been removed per bug 835013. Please file a new bug (or, I suppose, reopen this one) if you feel this check is still applicable to pkgcheck and doesn't already exist.
pkgcheck has MultipleKeywordsLines.