tools: Use hyphens instead of underscores for multi-word option names

tools/catch_exception_tool.cc

 // Copyright 2014 The Crashpad Authors. All rights reserved.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
 // You may obtain a copy of the License at
 //
 //     http://www.apache.org/licenses/LICENSE-2.0
 //
 // Unless required by applicable law or agreed to in writing, software
 // distributed under the License is distributed on an "AS IS" BASIS,
@@ skipping 152 matching lines @@
   const std::string& me_;
   int* exceptions_handled_;
 };
 
 void Usage(const std::string& me) {
   fprintf(stderr,
 "Usage: %s -m SERVICE [OPTION]...\n"
 "Catch Mach exceptions and display information about them.\n"
 "\n"
 "  -f, --file=FILE             append information to FILE instead of stdout\n"
-"  -m, --mach_service=SERVICE  register SERVICE with the bootstrap server\n"
+"  -m, --mach-service=SERVICE  register SERVICE with the bootstrap server\n"
 "  -n, --nonblocking           don't block waiting for an exception to occur\n"
 "  -p, --persistent            continue processing exceptions after the first\n"
 "  -t, --timeout=TIMEOUT       run for a maximum of TIMEOUT seconds\n"
 "      --help                  display this help and exit\n"
 "      --version               output version information and exit\n",
           me.c_str());
   ToolSupport::UsageTail(me);
 }
 
 int CatchExceptionToolMain(int argc, char* argv[]) {
@@ skipping 12 matching lines @@
 
     // Standard options.
     kOptionHelp = -2,
     kOptionVersion = -3,
   };
 
   Options options = {};
 
   const struct option long_options[] = {
       {"file", required_argument, nullptr, kOptionFile},
-      {"mach_service", required_argument, nullptr, kOptionMachService},
+      {"mach-service", required_argument, nullptr, kOptionMachService},
       {"nonblocking", no_argument, nullptr, kOptionNonblocking},
       {"persistent", no_argument, nullptr, kOptionPersistent},
       {"timeout", required_argument, nullptr, kOptionTimeout},
       {"help", no_argument, nullptr, kOptionHelp},
       {"version", no_argument, nullptr, kOptionVersion},
       {nullptr, 0, nullptr, 0},
   };
 
   int opt;
   while ((opt = getopt_long(argc, argv, "f:m:npt:", long_options, nullptr)) !=
@@ skipping 91 matching lines @@
 
   return EXIT_SUCCESS;
 }
 
 }  // namespace
 }  // namespace crashpad
 
 int main(int argc, char* argv[]) {
   return crashpad::CatchExceptionToolMain(argc, argv);
 }