doc: format all markdown doc

docs/mathutil_zh-CN.md

@@ -1,5 +1,6 @@
 # Mathutil
-mathutil包实现了一些数学计算的函数.
+
+mathutil 包实现了一些数学计算的函数.
 
 <div STYLE="page-break-after: always;"></div>
 
@@ -7,10 +8,10 @@ mathutil包实现了一些数学计算的函数.
 
 [https://github.com/duke-git/lancet/blob/v1/mathutil/mathutil.go](https://github.com/duke-git/lancet/blob/v1/mathutil/mathutil.go)
 
-
 <div STYLE="page-break-after: always;"></div>
 
 ## 用法:
+
 ```go
 import (
     "github.com/duke-git/lancet/mathutil"
@@ -20,21 +21,22 @@ import (
 <div STYLE="page-break-after: always;"></div>
 
 ## 目录
-- [Exponent](#Exponent)
-- [Fibonacci](#Fibonacci)
-- [Factorial](#Factorial)
 
-- [Percent](#Percent)
-- [RoundToFloat](#RoundToFloat)
-- [RoundToString](#RoundToString)
-- [TruncRound](#TruncRound)
+-   [Exponent](#Exponent)
+-   [Fibonacci](#Fibonacci)
+-   [Factorial](#Factorial)
+
+-   [Percent](#Percent)
+-   [RoundToFloat](#RoundToFloat)
+-   [RoundToString](#RoundToString)
+-   [TruncRound](#TruncRound)
 
 <div STYLE="page-break-after: always;"></div>
 
 ## Documentation
 
-
 ### <span id="Exponent">Exponent</span>
+
 <p>指数计算（x的n次方）</p>
 
 <b>函数签名:</b>
@@ -42,6 +44,7 @@ import (
 ```go
 func Exponent(x, n int64) int64
 ```
+
 <b>例子:</b>
 
 ```go
@@ -53,15 +56,14 @@ import (
 )
 
 func main() {
-	fmt.Println(mathutil.Exponent(10, 0)) //1
-	fmt.Println(mathutil.Exponent(10, 1)) //10
-	fmt.Println(mathutil.Exponent(10, 2)) //100
+    fmt.Println(mathutil.Exponent(10, 0)) //1
+    fmt.Println(mathutil.Exponent(10, 1)) //10
+    fmt.Println(mathutil.Exponent(10, 2)) //100
 }
 ```
 
-
-
 ### <span id="Fibonacci">Fibonacci</span>
+
 <p>计算斐波那契数列的第n个数</p>
 
 <b>函数签名:</b>
@@ -69,6 +71,7 @@ func main() {
 ```go
 func Fibonacci(first, second, n int) int
 ```
+
 <b>例子:</b>
 
 ```go
@@ -80,17 +83,16 @@ import (
 )
 
 func main() {
-	fmt.Println(mathutil.Fibonacci(1, 1, 1)) //1
-	fmt.Println(mathutil.Fibonacci(1, 1, 2)) //1
-	fmt.Println(mathutil.Fibonacci(1, 1, 3)) //2
-	fmt.Println(mathutil.Fibonacci(1, 1, 4)) //3
-	fmt.Println(mathutil.Fibonacci(1, 1, 5)) //5
+    fmt.Println(mathutil.Fibonacci(1, 1, 1)) //1
+    fmt.Println(mathutil.Fibonacci(1, 1, 2)) //1
+    fmt.Println(mathutil.Fibonacci(1, 1, 3)) //2
+    fmt.Println(mathutil.Fibonacci(1, 1, 4)) //3
+    fmt.Println(mathutil.Fibonacci(1, 1, 5)) //5
 }
 ```
 
-
-
 ### <span id="Factorial">Factorial</span>
+
 <p>计算阶乘</p>
 
 <b>函数签名:</b>
@@ -98,6 +100,7 @@ func main() {
 ```go
 func Factorial(x uint) uint
 ```
+
 <b>例子:</b>
 
 ```go
@@ -109,16 +112,15 @@ import (
 )
 
 func main() {
-	fmt.Println(mathutil.Factorial(0)) //1
-	fmt.Println(mathutil.Factorial(1)) //1
-	fmt.Println(mathutil.Factorial(2)) //2
-	fmt.Println(mathutil.Factorial(3)) //6
+    fmt.Println(mathutil.Factorial(0)) //1
+    fmt.Println(mathutil.Factorial(1)) //1
+    fmt.Println(mathutil.Factorial(2)) //2
+    fmt.Println(mathutil.Factorial(3)) //6
 }
 ```
 
-
-
 ### <span id="Percent">Percent</span>
+
 <p>计算百分比，保留n位小数</p>
 
 <b>函数签名:</b>
@@ -126,6 +128,7 @@ func main() {
 ```go
 func Percent(val, total float64, n int) float64
 ```
+
 <b>例子:</b>
 
 ```go
@@ -137,14 +140,13 @@ import (
 )
 
 func main() {
-	fmt.Println(mathutil.Percent(1, 2, 2)) //1
-	fmt.Println(mathutil.Percent(0.1, 0.3, 2)) //33.33
+    fmt.Println(mathutil.Percent(1, 2, 2)) //1
+    fmt.Println(mathutil.Percent(0.1, 0.3, 2)) //33.33
 }
 ```
 
-
-
 ### <span id="RoundToFloat">RoundToFloat</span>
+
 <p>四舍五入，保留n位小数</p>
 
 <b>函数签名:</b>
@@ -152,6 +154,7 @@ func main() {
 ```go
 func RoundToFloat(x float64, n int) float64
 ```
+
 <b>例子:</b>
 
 ```go
@@ -163,18 +166,16 @@ import (
 )
 
 func main() {
-	fmt.Println(mathutil.RoundToFloat(0, 0)) //0
-	fmt.Println(mathutil.RoundToFloat(0, 1)) //0
-	fmt.Println(mathutil.RoundToFloat(0.124, 2)) //0.12
-	fmt.Println(mathutil.RoundToFloat(0.125, 2)) //0.13
-	fmt.Println(mathutil.RoundToFloat(0.125, 3)) //0.125
+    fmt.Println(mathutil.RoundToFloat(0, 0)) //0
+    fmt.Println(mathutil.RoundToFloat(0, 1)) //0
+    fmt.Println(mathutil.RoundToFloat(0.124, 2)) //0.12
+    fmt.Println(mathutil.RoundToFloat(0.125, 2)) //0.13
+    fmt.Println(mathutil.RoundToFloat(0.125, 3)) //0.125
 }
 ```
 
-
-
-
 ### <span id="RoundToString">RoundToString</span>
+
 <p>四舍五入，保留n位小数，返回字符串</p>
 
 <b>函数签名:</b>
@@ -182,6 +183,7 @@ func main() {
 ```go
 func RoundToString(x float64, n int) string
 ```
+
 <b>例子:</b>
 
 ```go
@@ -193,17 +195,16 @@ import (
 )
 
 func main() {
-	fmt.Println(mathutil.RoundToString(0, 0)) //"0"
-	fmt.Println(mathutil.RoundToString(0, 1)) //"0.0:
-	fmt.Println(mathutil.RoundToString(0.124, 2)) //"0.12"
-	fmt.Println(mathutil.RoundToString(0.125, 2)) //"0.13"
-	fmt.Println(mathutil.RoundToString(0.125, 3)) //"0.125"
+    fmt.Println(mathutil.RoundToString(0, 0)) //"0"
+    fmt.Println(mathutil.RoundToString(0, 1)) //"0.0:
+    fmt.Println(mathutil.RoundToString(0.124, 2)) //"0.12"
+    fmt.Println(mathutil.RoundToString(0.125, 2)) //"0.13"
+    fmt.Println(mathutil.RoundToString(0.125, 3)) //"0.125"
 }
 ```
 
-
-
 ### <span id="TruncRound">TruncRound</span>
+
 <p>截短n位小数（不进行四舍五入）</p>
 
 <b>函数签名:</b>
@@ -211,6 +212,7 @@ func main() {
 ```go
 func TruncRound(x float64, n int) float64
 ```
+
 <b>例子:</b>
 
 ```go
@@ -222,13 +224,10 @@ import (
 )
 
 func main() {
-	fmt.Println(mathutil.TruncRound(0, 0)) //0
-	fmt.Println(mathutil.TruncRound(0, 1)) //0
-	fmt.Println(mathutil.TruncRound(0.124, 2)) //0.12
-	fmt.Println(mathutil.TruncRound(0.125, 2)) //0.12
-	fmt.Println(mathutil.TruncRound(0.125, 3)) //0.125
+    fmt.Println(mathutil.TruncRound(0, 0)) //0
+    fmt.Println(mathutil.TruncRound(0, 1)) //0
+    fmt.Println(mathutil.TruncRound(0.124, 2)) //0.12
+    fmt.Println(mathutil.TruncRound(0.125, 2)) //0.12
+    fmt.Println(mathutil.TruncRound(0.125, 3)) //0.125
 }
 ```
-
-
-