Repair-SPSite not doing anything?

When running the health checks for my upgrade from 2010 to 2013, it gives a list of customized files, most of these are template.doc in libraries, which we don't remember customizing, but I figured I'd reset them to the site definition anyway.

According to http://technet.microsoft.com/en-us/library/jj219720.aspx Repair-SPSite should automatically loop through and reset them to the site definition. But when I run it it does not seem to do anything at all.

Is there something I'm missing?

PS C:\installfiles\installfarm> Repair-SPSite <siteurl> -RuleId "cd839b0d-9707-4950-8fac-f306cb920f6c" -verbose
VERBOSE: Leaving BeginProcessing Method of Repair-SPSite.
VERBOSE: Performing operation "Repair-SPSite" on Target "Site <siteurl>, RuleId cd839b0d-9707-4950-8fac-f306cb920f6c".
Site               : SPSite Url=<siteurl>
Results            : {
                     SPSiteHealthResult Status=FailedWarning RuleName="Customized Files" RuleId=cd839b0d-9707-4950-8fac-f306cb920f6c}
PassedCount        : 0
FailedWarningCount : 1
FailedErrorCount   : 0
VERBOSE: Leaving ProcessRecord Method of Repair-SPSite.
VERBOSE: Leaving EndProcessing Method of Repair-SPSite.

I suppose i could just loop through all the SPWebs and use SPWeb.RevertAllDocumentContentStreams if this doesn't work.