Fix a bunch of spelling mistakes :\

src/scanner.cc

 // Copyright 2006-2008 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 759 matching lines @@
   // resolved to a keyword.
   if (has_escapes)
     return Token::IDENTIFIER;
 
   return Token::Lookup(&literals_.data()[next_.literal_pos]);
 }
 
 
 
 bool Scanner::IsIdentifier(unibrow::CharacterStream* buffer) {
-  // Checks whether the buffer contains an identifier (no escapse).
+  // Checks whether the buffer contains an identifier (no escape).
   if (!buffer->has_more()) return false;
   if (!kIsIdentifierStart.get(buffer->GetNext())) return false;
   while (buffer->has_more()) {
     if (!kIsIdentifierPart.get(buffer->GetNext())) return false;
   }
   return true;
 }
 
 
 bool Scanner::ScanRegExpPattern(bool seen_equal) {
@@ skipping 40 matching lines @@
   StartLiteral();
   while (kIsIdentifierPart.get(c0_))
     AddCharAdvance();
   TerminateLiteral();
 
   next_.location.end_pos = source_pos() - 1;
   return true;
 }
 
 } }  // namespace v8::internal