fix a typo

git-svn-id: https://hedgehog.fhcrc.org/bioconductor/branches/RELEASE_2_13/madman/Rpacks/flowWorkspace@86695 bc3139a8-67e5-0310-9ffc-ced21a209358
Merge commit '9590081e2d7b4cd04dd33a68c97ceb3ec9d5ee2f'
merge from git

git-svn-id: https://hedgehog.fhcrc.org/bioconductor/branches/RELEASE_2_13/madman/Rpacks/flowWorkspace@86700 bc3139a8-67e5-0310-9ffc-ced21a209358
fix test suite error due to the changes of testthat package. #133
Merge branch 'master' of github.com:RGLab/flowWorkspace
Merge branch 'trunk'
Merge commit '81fb2e71f8e9d1aca02c7d49fd25a4937c74a142'