westonpace commented on a change in pull request #11892:
URL: https://github.com/apache/arrow/pull/11892#discussion_r764459729



##########
File path: r/tests/testthat/test-csv.R
##########
@@ -447,5 +447,13 @@ test_that("write_csv_arrow deals with duplication in 
include_headers/col_names",
   )
   expect_true(file.exists(csv_file))
   expect_identical(tbl_no_dates, written_tbl)
+})
+
+test_that("read_csv_arrow() deals with BOMs (bite-order-marks) correctly", {
+  writeLines('\xef\xbb\xbfa,b\n1,2\n', con = csv_file)

Review comment:
       Sorry, I should have noticed this before but it looks like there are 
some R style violations
   ```suggestion
     writeLines("\xef\xbb\xbfa,b\n1,2\n", con = csv_file)
   ```




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