Spelling fixes e to i.

sdk/lib/_internal/js_runtime/lib/native_typed_data.dart

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 /**
  * Specialized integers and floating point numbers,
  * with SIMD support and efficient lists.
  */
 library dart.typed_data.implementation;
 
@@ skipping 1860 matching lines @@
 }
 
 /// Checks that the value is a Uint32. If not, it's not valid as an array
 /// index or offset. Also ensures that the value is non-negative.
 bool _isInvalidArrayIndex(int index) {
   return (JS('bool', '(# >>> 0 !== #)', index, index));
 }
 
 /// Checks that [index] is a valid index into [list] which has length [length].
 ///
-/// That is, [index] is an insteger in the range `0..length - 1`.
+/// That is, [index] is an integer in the range `0..length - 1`.
 void _checkValidIndex(int index, List list, int length) {
   if (_isInvalidArrayIndex(index) || JS('int', '#', index) >= length) {
     throw diagnoseIndexError(list, index);
   }
 }
 
 /// Checks that [start] and [end] form a range of a list of length [length].
 ///
 /// That is: `start` and `end` are integers with `0 <= start <= end <= length`.
 /// If `end` is `null` in which case it is considered to be `length`
 ///
 /// Returns the actual value of `end`, which is `length` if `end` is `null`, and
 /// the original value of `end` otherwise.
 int _checkValidRange(int start, int end, int length) {
   if (_isInvalidArrayIndex(start) || // Ensures start is non-negative int.
       ((end == null)
           ? start > length
           : (_isInvalidArrayIndex(end) || start > end || end > length))) {
     throw diagnoseRangeError(start, end, length);
   }
   if (end == null) return length;
   return end;
 }