Fix typo: intput-file -> input-file

runtime/bin/gen_snapshot.cc

 // Copyright (c) 2013, 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.
 
 // Generate a snapshot file after loading all the scripts specified on the
 // command line.
 
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
@@ skipping 971 matching lines @@
 "   --vm_snapshot_data=<output-file>                                         \n"
 "   --isolate_snapshot_data=<output-file>                                    \n"
 "   [<dart-script-file>]                                                     \n"
 "                                                                            \n"
 " Writes a snapshot of <dart-script-file> to the specified snapshot files.   \n"
 " If no <dart-script-file> is passed, a generic snapshot of all the corelibs \n"
 " is created.                                                                \n"
 "                                                                            \n"
 " To create a script snapshot with respect to a given core snapshot:         \n"
 "   --snapshot_kind=script                                                   \n"
-"   --vm_snapshot_data=<intput-file>                                         \n"
-"   --isolate_snapshot_data=<intput-file>                                    \n"
+"   --vm_snapshot_data=<input-file>                                          \n"
+"   --isolate_snapshot_data=<input-file>                                     \n"
 "   --script_snapshot=<output-file>                                          \n"
 "   <dart-script-file>                                                       \n"
 "                                                                            \n"
 "  Writes a snapshot of <dart-script-file> to the specified snapshot files.  \n"
 "  If no <dart-script-file> is passed, a generic snapshot of all the corelibs\n"
 "  is created.                                                               \n"
 "                                                                            \n"
 " To create an AOT application snapshot as blobs suitable for loading with   \n"
 " mmap:                                                                      \n"
 "   --snapshot_kind=app-aot-blobs                                            \n"
@@ skipping 893 matching lines @@
   delete mapped_isolate_snapshot_instructions;
   return 0;
 }
 
 }  // namespace bin
 }  // namespace dart
 
 int main(int argc, char** argv) {
   return dart::bin::main(argc, argv);
 }