for offset := int64(-3); offset <= 4; offset++ {
			brOff, brErr := br.Seek(offset, whence)
			srOff, srErr := sr.Seek(offset, whence)
			if (brErr != nil) != (srErr != nil) || brOff != srOff {
				t.Errorf("For whence %d, offset %d: bytes.Reader.Seek = (%v, %v) != SectionReader.Seek = (%v, %v)",
					whence, offset, brOff, brErr, srErr, srOff)
			}
		}
	}

	// And verify we can just seek past the end and get an EOF

	"□":                             "\u25a1",
	"□":                          "\u25a1",
	"▪":                          "\u25aa",
	"▪":                            "\u25aa",
	"→":                           "\u2192",
	"𝓈":                            "\U0001d4c8",
	"∖":                          "\u2216",
	"⌣":                          "\u2323",