# if (isLintrVersionOk(identical(Sys.getenv("TRAVIS"), "true"))) {
# test_that("lint check", {
# library("lintr")
# library("rex")
# # linters are defined in help_lint.R
# expect_lint_free(linters = linters)
# })
# } else {
# warning(paste("lintr test was disabled because of missing lintr.",
# "To run lintr test, please install the github version of lintr by running",
# "> devtools::install_github(\"jimhester/lintr\")", sep = "\n"))
# }
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