fails:IO::foreach yields a sequence of Strings that were separated by $/
fails:IO::foreach yields a sequence of Strings that were separated by r
fails:IO::foreach yields a single string with entire content when the separator is nil
fails:IO::foreach yields a sequence of paragraphs when the separator is an empty string
fails:IO::foreach can handle non-ASCII data as separator
fails:IO::foreach converts first parameter to string and uses as file name
fails:IO::foreach converts second parameter to string and uses as separator
