Format and remove 11.2.md spaces

zh/11.2.md

@@ -98,31 +98,31 @@ GDB的一些常用命令如下所示
 我们通过下面这个代码来演示如何通过GDB来调试Go程序，下面是将要演示的代码：
 ```Go
 
-	package main
+package main
 
-	import (
-		"fmt"
-		"time"
-	)
+import (
+	"fmt"
+	"time"
+)
 
-	func counting(c chan<- int) {
-		for i := 0; i < 10; i++ {
-			time.Sleep(2 * time.Second)
-			c <- i
-		}
-		close(c)
+func counting(c chan<- int) {
+	for i := 0; i < 10; i++ {
+		time.Sleep(2 * time.Second)
+		c <- i
 	}
+	close(c)
+}
 
-	func main() {
-		msg := "Starting main"
-		fmt.Println(msg)
-		bus := make(chan int)
-		msg = "starting a gofunc"
-		go counting(bus)
-		for count := range bus {
-			fmt.Println("count:", count)
-		}
+func main() {
+	msg := "Starting main"
+	fmt.Println(msg)
+	bus := make(chan int)
+	msg = "starting a gofunc"
+	go counting(bus)
+	for count := range bus {
+		fmt.Println("count:", count)
 	}
+}
 ```
 编译文件，生成可执行文件gdbfile: