Replace "for" with "repeat"

Author: tatsuyafujisaki

Diff for: README.md

@@ -273,7 +273,6 @@ The `develop` branch is pushed to `master` during release.
 [ListenableFuture.await]: https://kotlin.github.io/kotlinx.coroutines/kotlinx-coroutines-guava/kotlinx.coroutines.guava/com.google.common.util.concurrent.-listenable-future/await.html
 <!--- MODULE kotlinx-coroutines-play-services -->
 <!--- INDEX kotlinx.coroutines.tasks -->
-[Task.await]: https://kotlin.github.io/kotlinx.coroutines/kotlinx-coroutines-play-services/kotlinx.coroutines.tasks/com.google.android.gms.tasks.-task/await.html
 <!--- MODULE kotlinx-coroutines-reactive -->
 <!--- INDEX kotlinx.coroutines.reactive -->
 [Publisher.collect]: https://kotlin.github.io/kotlinx.coroutines/kotlinx-coroutines-reactive/kotlinx.coroutines.reactive/org.reactivestreams.-publisher/collect.html

Diff for: docs/channels.md

@@ -209,7 +209,9 @@ fun main() = runBlocking {
 //sampleStart
     val numbers = produceNumbers() // produces integers from 1 and on
     val squares = square(numbers) // squares integers
-    for (i in 1..5) println(squares.receive()) // print first five
+    repeat(5) {
+        println(squares.receive()) // print first five
+    }
     println("Done!") // we are done
     coroutineContext.cancelChildren() // cancel children coroutines
 //sampleEnd
@@ -297,7 +299,7 @@ import kotlinx.coroutines.channels.*
 fun main() = runBlocking {
 //sampleStart
     var cur = numbersFrom(2)
-    for (i in 1..10) {
+    repeat(10) {
         val prime = cur.receive()
         println(prime)
         cur = filter(cur, prime)

Diff for: kotlinx-coroutines-core/jvm/test/guide/example-channel-04.kt

@@ -11,7 +11,9 @@ import kotlinx.coroutines.channels.*
 fun main() = runBlocking {
     val numbers = produceNumbers() // produces integers from 1 and on
     val squares = square(numbers) // squares integers
-    for (i in 1..5) println(squares.receive()) // print first five
+    repeat(5) {
+        println(squares.receive()) // print first five
+    }
     println("Done!") // we are done
     coroutineContext.cancelChildren() // cancel children coroutines
 }

Diff for: kotlinx-coroutines-core/jvm/test/guide/example-channel-05.kt

@@ -10,7 +10,7 @@ import kotlinx.coroutines.channels.*
 
 fun main() = runBlocking {
     var cur = numbersFrom(2)
-    for (i in 1..10) {
+    repeat(10) {
         val prime = cur.receive()
         println(prime)
         cur = filter(cur, prime)