rubocop -a --only Style/FetchEnvVar

Author: amatsuda

lib/simplecov/load_global_config.rb

@@ -1,7 +1,7 @@
 # frozen_string_literal: true
 
 require "etc"
-home_dir = (ENV["HOME"] && File.expand_path("~")) || Etc.getpwuid.dir || (ENV["USER"] && File.expand_path("~#{ENV['USER']}"))
+home_dir = (ENV.fetch("HOME", nil) && File.expand_path("~")) || Etc.getpwuid.dir || (ENV.fetch("USER", nil) && File.expand_path("~#{ENV.fetch('USER', nil)}"))
 if home_dir
   global_config_path = File.join(home_dir, ".simplecov")
   load global_config_path if File.exist?(global_config_path)