Fix fastfloat parsing for -1234. (#6)

Author: klondikedragon

fastfloat/parse.go

@@ -271,6 +271,9 @@ func ParseBestEffort(s string) float64 {
 		if i >= uint(len(s)) {
 			// the fractional part may be elided to remain compliant
 			// with https://go.dev/ref/spec#Floating-point_literals
+			if minus {
+				f = -f
+			}
 			return f
 		}
 		k := i
@@ -429,6 +432,9 @@ func Parse(s string) (float64, error) {
 		if i >= uint(len(s)) {
 			// the fractional part might be elided to remain compliant
 			// with https://go.dev/ref/spec#Floating-point_literals
+			if minus {
+				f = -f
+			}
 			return f, nil
 		}
 		k := i

fastfloat/parse_test.go

@@ -264,6 +264,7 @@ func TestParseBestEffort(t *testing.T) {
 	f("12.", 12)
 	f(".12", 0.12)
 	f("-.12", -0.12)
+	f("-1234.", -1234)
 	f("12345.12345678901", 12345.12345678901)
 	f("12345.123456789012", 12345.123456789012)
 	f("12345.1234567890123", 12345.1234567890123)
@@ -417,6 +418,7 @@ func TestParseSuccess(t *testing.T) {
 	f("12.", 12)
 	f(".12", 0.12)
 	f("-.12", -0.12)
+	f("-1234.", -1234)
 	f("12345.12345678901", 12345.12345678901)
 	f("12345.123456789012", 12345.123456789012)
 	f("12345.1234567890123", 12345.1234567890123)