Autocorrect new FetchEnvVar & Style/EnvHome cops

Author: hennevogel

.irbrc

@@ -7,4 +7,4 @@ ARGV.concat ['--readline', '--prompt-mode', 'simple']
 IRB.conf[:SAVE_HISTORY] = 500
 
 # Store results in home directory with specified file name
-IRB.conf[:HISTORY_FILE] = "#{ENV['HOME']}/.irb_history"
+IRB.conf[:HISTORY_FILE] = "#{Dir.home}/.irb_history"

bin/bundle

@@ -18,7 +18,7 @@ m = Module.new do
   end
 
   def env_var_version
-    ENV['BUNDLER_VERSION']
+    ENV.fetch('BUNDLER_VERSION', nil)
   end
 
   def cli_arg_version
@@ -38,7 +38,7 @@ m = Module.new do
   end
 
   def gemfile
-    gemfile = ENV['BUNDLE_GEMFILE']
+    gemfile = ENV.fetch('BUNDLE_GEMFILE', nil)
     return gemfile if gemfile && !gemfile.empty?
 
     File.expand_path('../Gemfile', __dir__)

config/initializers/sentry.rb

@@ -1,5 +1,5 @@
 Sentry.init do |config|
-  config.dsn = ENV['HACKWEEK_SENTRY_DSN']
+  config.dsn = ENV.fetch('HACKWEEK_SENTRY_DSN', nil)
   config.breadcrumbs_logger = [:active_support_logger]
 
   # To activate performance monitoring, set one of these options.