Added option --shell to D8 and updated the usage text.

src/flags.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 498 matching lines @@
 
 
 // static
 void FlagList::PrintHelp() {
   printf("Usage:\n");
   printf("  shell [options] -e string\n");
   printf("    execute string in V8\n");
   printf("  shell [options] file1 file2 ... filek\n");
   printf("    run JavaScript scripts in file1, file2, ..., filek\n");
   printf("  shell [options]\n");
-  printf("  shell [options] --shell\n");
-  printf("    run an interactive JavaScript shell");
-  printf("  d8 [options] file\n");
+  printf("  shell [options] --shell [file1 file2 ... filek]\n");
+  printf("    run an interactive JavaScript shell\n");
+  printf("  d8 [options] file1 file2 ... filek\n");
   printf("  d8 [options]\n");
+  printf("  d8 [options] --shell [file1 file2 ... filek]\n");
   printf("    run the new debugging shell\n\n");
   printf("Options:\n");
   for (size_t i = 0; i < num_flags; ++i) {
     Flag* f = &flags[i];
     SmartPointer<const char> value = ToString(f);
     printf("  --%s (%s)\n        type: %s  default: %s\n",
            f->name(), f->comment(), Type2String(f->type()), *value);
   }
 }
 
 JSArguments::JSArguments()
     : argc_(0), argv_(NULL) {}
 JSArguments::JSArguments(int argc, const char** argv)
     : argc_(argc), argv_(argv) {}
 int JSArguments::argc() const { return argc_; }
 const char** JSArguments::argv() { return argv_; }
 const char*& JSArguments::operator[](int idx) { return argv_[idx]; }
 JSArguments& JSArguments::operator=(JSArguments args) {
     argc_ = args.argc_;
     argv_ = args.argv_;
     return *this;
 }
 
 
 } }  // namespace v8::internal