Fix too many the and it on some comments (#4200)

Author: ParkJong-Hun

docs/topics/channels.md

@@ -364,7 +364,7 @@ fun CoroutineScope.launchProcessor(id: Int, channel: ReceiveChannel<Int>) = laun
 >
 {type="note"}
 
-The output will be similar to the the following one, albeit the processor ids that receive
+The output will be similar to the following one, albeit the processor ids that receive
 each specific integer may be different:
 
 ```text

kotlinx-coroutines-core/common/src/flow/Migration.kt

@@ -90,7 +90,7 @@ public fun <T> Flow<T>.publishOn(context: CoroutineContext): Flow<T> = noImpl()
  *        }
  * }
  * ```
- * Opposed to subscribeOn, it it **possible** to use multiple `flowOn` operators in the one flow
+ * Opposed to subscribeOn, it is **possible** to use multiple `flowOn` operators in the one flow
  * @suppress
  */
 @Deprecated(message = "Use 'flowOn' instead", level = DeprecationLevel.ERROR)

kotlinx-coroutines-core/common/src/flow/operators/Limit.kt

@@ -123,7 +123,7 @@ internal suspend inline fun <T> Flow<T>.collectWhile(crossinline predicate: susp
     val collector = object : FlowCollector<T> {
         override suspend fun emit(value: T) {
             // Note: we are checking predicate first, then throw. If the predicate does suspend (calls emit, for example)
-            // the the resulting code is never tail-suspending and produces a state-machine
+            // the resulting code is never tail-suspending and produces a state-machine
             if (!predicate(value)) {
                 throw AbortFlowException(this)
             }