Correct trailing brace in transformWhile docs. (#3290)

Author: lowasser

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

@@ -109,7 +109,6 @@ public fun <T> Flow<T>.takeWhile(predicate: suspend (T) -> Boolean): Flow<T> = f
  *         emit(progress) // always emit progress
  *         !progress.isDone() // continue while download is not done
  *     }
- * }
  * ```
  */
 public fun <T, R> Flow<T>.transformWhile(