Update BufferEncoder.js

Author: username0101010

lib/BufferEncoder.js

@@ -29,7 +29,7 @@ BufferEncoder.prototype.encode = function(key, val, index) {
             if (val === null)
                 this._setMark(marks.DEFAULT_MARK_NULL, index);
 
-			// Array: []
+            // Array: []
             else if (Array.isArray(val)) {
                 index === 0 && this._toInt8(marks.DEFAULT_MARK_ARR_OPEN);