message: [vcpkgTools.xml] Restructre os-specific info
diff: @@ -46,9 +46,9 @@ namespace vcpkg
  #if defined(_WIN32)
  static constexpr StringLiteral OS_STRING = "";
  #elif defined(__APPLE__)
  - static constexpr StringLiteral OS_STRING = " os=\"osx\"";
  + static constexpr StringLiteral OS_STRING = R"(os="osx")";
  #else // assume linux
  - static constexpr StringLiteral OS_STRING = " os=\"linux\"";
  + static constexpr StringLiteral OS_STRING = R"(os="linux")";
  #endif
  static const fs::path XML_PATH = paths.scripts / "vcpkgTools.xml";
  @@ -72,15 +72,15 @@ namespace vcpkg
  };
  static const std::string XML = paths.get_filesystem().read_contents(XML_PATH).value_or_exit(VCPKG_LINE_INFO);
  - static const std::regex VERSION_REGEX{
  - Strings::format(R"###(<requiredVersion>([\s\S]*?)</requiredVersion>)###", tool)};
  + static const std::regex VERSION_REGEX{R"###(<requiredVersion>([\s\S]*?)</requiredVersion>)###"};
  static const std::regex EXE_RELATIVE_PATH_REGEX{
  - Strings::format(R"###(<exeRelativePath%s>([\s\S]*?)</exeRelativePath>)###", OS_STRING)};
  + Strings::format(R"###(<exeRelativePath>([\s\S]*?)</exeRelativePath>)###")};
  static const std::regex ARCHIVE_RELATIVE_PATH_REGEX{
  - Strings::format(R"###(<archiveRelativePath%s>([\s\S]*?)</archiveRelativePath>)###", OS_STRING)};
  - static const std::regex URL_REGEX{Strings::format(R"###(<url%s>([\s\S]*?)</url>)###", OS_STRING)};
  + Strings::format(R"###(<archiveRelativePath>([\s\S]*?)</archiveRelativePath>)###")};
  + static const std::regex URL_REGEX{Strings::format(R"###(<url>([\s\S]*?)</url>)###")};
  - const std::regex tool_regex{Strings::format(R"###(<tool[\s]+name="%s">([\s\S]*?)</tool>)###", tool)};
  + const std::regex tool_regex{
  + Strings::format(R"###(<tool[\s]+name="%s"[\s]+%s>([\s\S]*?)</tool>)###", tool, OS_STRING)};
  std::smatch match_tool;
  const bool has_match_tool = std::regex_search(XML.cbegin(), XML.cend(), match_tool, tool_regex);
  