Fix indentation of sampleStart/startEnd comments in doc sample
diff --git a/docs/composing-suspending-functions.md b/docs/composing-suspending-functions.md
index 0ce4c15..f67fe5b 100644
--- a/docs/composing-suspending-functions.md
+++ b/docs/composing-suspending-functions.md
@@ -350,12 +350,12 @@
 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 {