Fix a bunch of spelling mistakes :\

src/scanner.cc

Index: src/scanner.cc
diff --git a/src/scanner.cc b/src/scanner.cc
index 3ae6936f2421582a8c50754ddb209565ce620dc1..8585e3836ecbf2a6663c4d88b37f337ff8b2a8eb 100644
--- a/src/scanner.cc
+++ b/src/scanner.cc
@@ -777,7 +777,7 @@ Token::Value Scanner::ScanIdentifier() {
 
 
 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()) {