Revert "std: float64/32 clean up e-09 to e-9"

This reverts commit 10b9ac0.

Author: molon

stream_float.go

@@ -27,14 +27,6 @@ func (stream *Stream) WriteFloat32(val float32) {
 		}
 	}
 	stream.buf = strconv.AppendFloat(stream.buf, float64(val), fmt, -1, 32)
-	if fmt == 'e' {
-		// clean up e-09 to e-9
-		n := len(stream.buf)
-		if n >= 4 && stream.buf[n-4] == 'e' && stream.buf[n-3] == '-' && stream.buf[n-2] == '0' {
-			stream.buf[n-2] = stream.buf[n-1]
-			stream.buf = stream.buf[:n-1]
-		}
-	}
 }
 
 // WriteFloat32Lossy write float32 to stream with ONLY 6 digits precision although much much faster
@@ -84,14 +76,6 @@ func (stream *Stream) WriteFloat64(val float64) {
 		}
 	}
 	stream.buf = strconv.AppendFloat(stream.buf, float64(val), fmt, -1, 64)
-	if fmt == 'e' {
-		// clean up e-09 to e-9
-		n := len(stream.buf)
-		if n >= 4 && stream.buf[n-4] == 'e' && stream.buf[n-3] == '-' && stream.buf[n-2] == '0' {
-			stream.buf[n-2] = stream.buf[n-1]
-			stream.buf = stream.buf[:n-1]
-		}
-	}
 }
 
 // WriteFloat64Lossy write float64 to stream with ONLY 6 digits precision although much much faster

value_tests/float_test.go

@@ -4,11 +4,10 @@ import (
 	"bytes"
 	"encoding/json"
 	"fmt"
+	"github.com/json-iterator/go"
+	"github.com/stretchr/testify/require"
 	"strconv"
 	"testing"
-
-	jsoniter "github.com/json-iterator/go"
-	"github.com/stretchr/testify/require"
 )
 
 func Test_read_float(t *testing.T) {
@@ -89,7 +88,7 @@ func Test_write_float32(t *testing.T) {
 
 	stream = jsoniter.NewStream(jsoniter.ConfigDefault, nil, 0)
 	stream.WriteFloat32(float32(0.0000001))
-	should.Equal("1e-7", string(stream.Buffer()))
+	should.Equal("1e-07", string(stream.Buffer()))
 }
 
 func Test_write_float64(t *testing.T) {
@@ -126,5 +125,5 @@ func Test_write_float64(t *testing.T) {
 
 	stream = jsoniter.NewStream(jsoniter.ConfigDefault, nil, 0)
 	stream.WriteFloat64(float64(0.0000001))
-	should.Equal("1e-7", string(stream.Buffer()))
+	should.Equal("1e-07", string(stream.Buffer()))
 }