[("tests/examples/Default27.hs:1:7: Error: Use when\nFound:\n if foo then stuff else return ()\nWhy not:\n Control.Monad.when foo stuff\n",[Replace {rtype = Expr, pos = SrcSpan {startLine = 1, startCol = 7, endLine = 1, endCol = 39}, subts = [("x",SrcSpan {startLine = 1, startCol = 10, endLine = 1, endCol = 13}),("y",SrcSpan {startLine = 1, startCol = 19, endLine = 1, endCol = 24})], orig = "Control.Monad.when x y"}])]