fix all instances of "the the"

pkg/compiler/lib/src/string_validator.dart

Index: pkg/compiler/lib/src/string_validator.dart
diff --git a/pkg/compiler/lib/src/string_validator.dart b/pkg/compiler/lib/src/string_validator.dart
index 70a90b9fad1c322124e019b1b3a8d96327145375..19656950787e33d98880ba8b92d4a188e460673f 100644
--- a/pkg/compiler/lib/src/string_validator.dart
+++ b/pkg/compiler/lib/src/string_validator.dart
@@ -52,7 +52,7 @@ class StringValidator {
 
       // 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