fix all instances of "the the"

pkg/compiler/lib/src/string_validator.dart

 // Copyright (c) 2012, 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 the validity of string literals.
 
 library stringvalidator;
 
 import 'dart:collection';
 
@@ skipping 34 matching lines @@
     // String has at least one quote. Check it if has three.
     // If it only has two, the string must be an empty string literal,
     // and end after the second quote.
     if (source.moveNext() && source.current == quoteChar && source.moveNext()) {
       int code = source.current;
       assert(code == quoteChar); // If not, there is a bug in the parser.
       leftQuoteLength = 3;
 
       // Check if a multiline string starts with optional whitespace followed by
       // a newline (CR, LF or CR+LF).
-      // We also accept if the these characters are escaped by a backslash.
+      // We also accept if these characters are escaped by a backslash.
       int newLineLength = 1;
       while (true) {
         // Due to string-interpolations we are not guaranteed to see the
         // trailing quoting characters. The invocations to `moveNext()` may
         // therefore return false and the `current`-getter return `null`. The
         // code does not need to handle this specially (as it will not find the
         // newline characters).
         source.moveNext();
         code = source.current;
         if (code == $BACKSLASH) {
@@ skipping 153 matching lines @@
       return null;
     }
     // String literal successfully validated.
     if (quoting.raw || !containsEscape) {
       // A string without escapes could just as well have been raw.
       return new DartString.rawString(string, length);
     }
     return new DartString.escapedString(string, length);
   }
 }