Improve the consistency between code and comments in Kotlin (#1268)

* style(kotlin): Make code and comments consistent.

* style(kotlin): convert comment location.

* style(c): Add missing comment.

* style(kotlin): Remove redundant semicolon, parenthesis and brace

* style(kotlin): Put constants inside the function.

* style(kotlin): fix unnecessary indentation.

* style(swift): Add missing comment.

* style(kotlin): Add missing comment.

* style(kotlin): Remove redundant comment.

* style(kotlin): Add missing comment.

* Update linked_list.kt

* style(csharp,js,ts): Add missing comment.

* style(kotlin): Remove empty lines.

* Update list.cs

* Update list.js

* Update list.ts

* roll back to commit 1

* style(cs,js,ts): Add missing comment in docfile.

* style(kotlin): Use normal element swapping instead of scope functions.

codes/kotlin/chapter_heap/my_heap.kt

@@ -41,7 +41,9 @@ class MaxHeap(nums: MutableList<Int>?) {
 
     /* 交换元素 */
     private fun swap(i: Int, j: Int) {
-        maxHeap[i] = maxHeap[j].also { maxHeap[j] = maxHeap[i] }
+        val temp = maxHeap[i]
+        maxHeap[i] = maxHeap[j]
+        maxHeap[j] = temp
     }
 
     /* 获取堆大小 */