Bain2k9@Bain2k9-PC ~/rockbox
$ svn revert -r
svn: missing argument: r
Type 'svn help' for usage.
Bain2k9@Bain2k9-PC ~/rockbox
$ svn revert -R
svn: Try 'svn help' for more info
svn: Not enough arguments provided
Bain2k9@Bain2k9-PC ~/rockbox
$ svn revert -R
svn: Try 'svn help' for more info
svn: Not enough arguments provided