Spelling fixes e to i.

tests/language/vm/regress_29137_vm_test.dart

 // Copyright (c) 2017, 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.
 //
 // Check that optimizer correctly handles (x << y) & MASK_32 pattern on 32-bit
 // platforms: given the pattern
 //
 //     v1 <- UnboxedIntConverter([tr] mint->uint32, v0)
 //     v2 <- UnboxedIntConverter(uint32->mint, v1)
 //
 // optimizer must *not* replace v2 with v0 because the first conversion is
 // truncating and is erasing the high part of the mint value.
 //
 // VMOptions=--optimization-counter-threshold=5 --no-background-compilation
 
 import "package:expect/expect.dart";
 
 const _MASK_32 = 0xffffffff;
 int _rotl32(int val, int shift) {
   final mod_shift = shift & 31;
   return ((val << mod_shift) & _MASK_32) |
       ((val & _MASK_32) >> (32 - mod_shift));
 }
 
 rot8(v) => _rotl32(v, 8);
 
 main() {
   // Note: value is selected in such a way that (value << 8) is not a smi - this
-  // triggers emittion of BinaryMintOp instructions for shifts.
+  // triggers emission of BinaryMintOp instructions for shifts.
   const value = 0xF0F00000;
   const rotated = 0xF00000F0;
   Expect.equals(rotated, rot8(value));
   for (var i = 0; i < 10; i++) {
     Expect.equals(rotated, rot8(value));
   }
 }