if cookie != sdata {
		t.Fatalf("ReadMIMEHeader: %v bytes, want %v bytes", len(cookie), len(sdata))
	}
}

// TestReadMIMEHeaderNonCompliant checks that we don't normalize headers
// with spaces before colons, and accept spaces in keys.
func TestReadMIMEHeaderNonCompliant(t *testing.T) {
	// These invalid headers will be rejected by net/http according to RFC 7230.
	r := reader("Foo: bar\r\n" +