Enter typed percentages as exact decimals

Dami committed Sep 27847d801

"0.7%" was 0.7/100, which is 0.006999999999999999 in binary. Shifting
the decimal point in the parsed text gives the double nearest 0.007, as
Sheets stores it.

commit: 847d80168c0f8f7c2efda21c93a4e170d8835939
parent: bd2463f26acac0c333f4f60624acf361cac2a67a
author: Dami <dami.etoile@gmail.com>

2 files changed, +9 -1wrap lines

M	internal/sheet/format_test.go	2	++
M	internal/sheet/number.go	8	+++++++-

M internal/sheet/format_test.go +2 -0

@@ -131,6 +131,8 @@ func TestEntryDetection(t *testing.T) {
131131 		{"-$5", -5, Format{Kind: FmtCurrency}, "-$5"},132132 		{"12%", 0.12, Format{Kind: FmtPercent}, "12%"},133133 		{"12.5%", 0.125, Preset(FmtPercent), "12.50%"},134+		{"0.7%", 0.007, Preset(FmtPercent), "0.70%"}, // not 0.006999999999999999135+		{"1e3%", 10, Format{Kind: FmtPercent}, "1000%"},134136 		{"1,234", 1234, Format{Kind: FmtNumber}, "1,234"},135137 		{"1.5e3", 1500, Preset(FmtScientific), "1.50E+03"},136138 		{"9/26/2026", 46291, Preset(FmtDate), "9/26/2026"},

M internal/sheet/number.go +7 -1

@@ -55,7 +55,13 @@ func parseNumberFormat(s string) (float64, Format, bool) {
5555 		return 0, Format{}, false5656 	}5757 	if pct {58-		v /= 10058+		// Shift the decimal point rather than divide, so "0.7%" is the59+		// double nearest 0.007 and not 0.006999999999999999.60+		if p, err := strconv.ParseFloat(s+"e-2", 64); err == nil {61+			v = p62+		} else {63+			v /= 10064+		}5965 	}6066 	if neg {6167 		v = -v