# File lib/dotenv/substitutions/command.rb, line 16
        def call(value, env)
          # Process interpolated shell commands
          value.gsub(INTERPOLATED_SHELL_COMMAND) do |*|
            command = $~[:cmd][1..-2] # Eliminate opening and closing parentheses

            if $~[:backslash]
              $~[0][1..-1]
            else
              `#{command}`.chomp
            end
          end
        end