Shorter example and formatting.

- Refactored the last example because it was too long.
- Output should be a comment.

Author: LarryBattle

ebook/07.6.md

@@ -68,7 +68,7 @@
 	在s字符串中去除cutset指定的字符串
 
 		fmt.Printf("[%q]", strings.Trim(" !!! Achtung !!! ", "! "))
-		Output:["Achtung"]
+		//Output:["Achtung"]
 
 - func Fields(s string) []string
 
@@ -125,30 +125,25 @@
 			"fmt"
 			"strconv"
 		)
-
+		func checkError(e error){
+			if e != nil{
+				fmt.Println(e)
+			}
+		}
 		func main() {
 			a, err := strconv.ParseBool("false")
-			if err != nil {
-				fmt.Println(err)
-			}
+			checkError(err)
 			b, err := strconv.ParseFloat("123.23", 64)
-			if err != nil {
-				fmt.Println(err)
-			}
+			checkError(err)
 			c, err := strconv.ParseInt("1234", 10, 64)
-			if err != nil {
-				fmt.Println(err)
-			}
+			checkError(err)
 			d, err := strconv.ParseUint("12345", 10, 64)
-			if err != nil {
-				fmt.Println(err)
-			}
+			checkError(err)
 			e, err := strconv.Atoi("1023")
-			if err != nil {
-				fmt.Println(err)
-			}
+			checkError(err)
 			fmt.Println(a, b, c, d, e)
 		}
+
 
 
 ## links