Clean up language in the array section.

Author: michaeltwofish

doc/en/array/constructor.md

@@ -21,15 +21,15 @@ the actual indexes of the array will not be initialized.
     arr[1]; // undefined
     1 in arr; // false, the index was not set
 
-The behavior of being able to set the length of the array upfront only comes in 
-handy in a few cases, like repeating a string, in which it avoids the use of a 
-`for loop` code.
+Being able to set the length of the array in advance is only useful in a few
+cases, like repeating a string, in which it avoids the use of a `for loop`
+code.
 
     new Array(count + 1).join(stringToRepeat);
 
 ### In Conclusion
 
-The use of the `Array` constructor should be avoided as much as possible. 
-Literals are definitely preferred. They are shorter and have a clearer syntax; 
-therefore, they also increase the readability of the code.
+The use of the `Array` constructor should be avoided. Literals are definitely
+preferred. They are shorter, have a clearer syntax, and increase code
+readability.