One of the integer part or the fractional part may be elided; the radix point may be elided as well,
but the exponent part is required. (This syntax matches the one given in IEEE 754-2008 §5.12.3.)
An exponent value exp scales the mantissa (integer and fractional part) by 2<sup>exp</sup>.
</p>

<p>
For readability, an underscore character <code>_</code> may appear after

		wantValid:    true,
		wantAligned:  []sparseEntry{{0, 1536}, {8192, 1808}},
		wantInverted: []sparseEntry{{2000, 6000}, {10000, 0}},
	}, {
		in: []sparseEntry{{0, 2000}, {2000, 2000}, {4000, 0}, {4000, 3000}, {7000, 1000}, {8000, 0}, {8000, 2000}}, size: 10000,
		wantValid:    true,
		wantAligned:  []sparseEntry{{0, 1536}, {2048, 1536}, {4096, 2560}, {7168, 512}, {8192, 1808}},