Fixes some indentions inside code samples
diff --git a/docs/composing-suspending-functions.md b/docs/composing-suspending-functions.md
index dafa8d6..0ce4c15 100644
--- a/docs/composing-suspending-functions.md
+++ b/docs/composing-suspending-functions.md
@@ -332,7 +332,7 @@
 suspend fun concurrentSum(): Int = coroutineScope {
     val one = async { doSomethingUsefulOne() }
     val two = async { doSomethingUsefulTwo() }
-     one.await() + two.await()
+    one.await() + two.await()
 }
 ```
 
@@ -350,18 +350,18 @@
 import kotlin.system.*
 
 fun main() = runBlocking<Unit> {
-//sampleStart
+    //sampleStart
     val time = measureTimeMillis {
         println("The answer is ${concurrentSum()}")
     }
     println("Completed in $time ms")
-//sampleEnd    
+    //sampleEnd    
 }
 
 suspend fun concurrentSum(): Int = coroutineScope {
     val one = async { doSomethingUsefulOne() }
     val two = async { doSomethingUsefulTwo() }
-     one.await() + two.await()
+    one.await() + two.await()
 }
 
 suspend fun doSomethingUsefulOne(): Int {
@@ -418,7 +418,7 @@
         println("Second child throws an exception")
         throw ArithmeticException()
     }
-        one.await() + two.await()
+    one.await() + two.await()
 }
 ```