You have two backslashes ( \). When you use two sequential escape characters, the first one escapes the second one. What does that mean? "\n" adds the newline character to a string whereas "\\n" adds the characters ā\nā to the string.
const myStr = "FirstLine\n\t\SecondLine\nThirdLine"; // Change this line
so I took the one backslash out so I dont have two. and it gives me this
// running tests
SecondLine should be preceded by the backslash character
myStr should only contain characters shown in the instructions
// tests completed