Invoke 'rails' instead of 'rake' in AppGenerator

Follows the convention from Rails 5 of invoking tasks on the command-line
with `rails …` rather than `rake …`.

railties/lib/rails/generators/actions.rb

@@ -216,7 +216,7 @@ def rake(command, options={})
         log :rake, command
         env  = options[:env] || ENV["RAILS_ENV"] || 'development'
         sudo = options[:sudo] && RbConfig::CONFIG['host_os'] !~ /mswin|mingw/ ? 'sudo ' : ''
-        in_root { run("#{sudo}#{extify(:rake)} #{command} RAILS_ENV=#{env}", verbose: false) }
+        in_root { run("#{sudo}#{extify(:rails)} #{command} RAILS_ENV=#{env}", verbose: false) }
       end
       alias :rails_command :rake
 

railties/test/generators/actions_test.rb

@@ -202,7 +202,7 @@ def test_generate_should_run_script_generate_with_argument_and_options
   end
 
   def test_rake_should_run_rake_command_with_default_env
-    assert_called_with(generator, :run, ["rake log:clear RAILS_ENV=development", verbose: false]) do
+    assert_called_with(generator, :run, ["rails log:clear RAILS_ENV=development", verbose: false]) do
       with_rails_env nil do
         action :rake, 'log:clear'
       end
@@ -210,13 +210,13 @@ def test_rake_should_run_rake_command_with_default_env
   end
 
   def test_rake_with_env_option_should_run_rake_command_in_env
-    assert_called_with(generator, :run, ['rake log:clear RAILS_ENV=production', verbose: false]) do
+    assert_called_with(generator, :run, ['rails log:clear RAILS_ENV=production', verbose: false]) do
       action :rake, 'log:clear', env: 'production'
     end
   end
 
   def test_rake_with_rails_env_variable_should_run_rake_command_in_env
-    assert_called_with(generator, :run, ['rake log:clear RAILS_ENV=production', verbose: false]) do
+    assert_called_with(generator, :run, ['rails log:clear RAILS_ENV=production', verbose: false]) do
       with_rails_env "production" do
         action :rake, 'log:clear'
       end
@@ -224,7 +224,7 @@ def test_rake_with_rails_env_variable_should_run_rake_command_in_env
   end
 
   def test_env_option_should_win_over_rails_env_variable_when_running_rake
-    assert_called_with(generator, :run, ['rake log:clear RAILS_ENV=production', verbose: false]) do
+    assert_called_with(generator, :run, ['rails log:clear RAILS_ENV=production', verbose: false]) do
       with_rails_env "staging" do
         action :rake, 'log:clear', env: 'production'
       end
@@ -232,7 +232,7 @@ def test_env_option_should_win_over_rails_env_variable_when_running_rake
   end
 
   def test_rake_with_sudo_option_should_run_rake_command_with_sudo
-    assert_called_with(generator, :run, ["sudo rake log:clear RAILS_ENV=development", verbose: false]) do
+    assert_called_with(generator, :run, ["sudo rails log:clear RAILS_ENV=development", verbose: false]) do
       with_rails_env nil do
         action :rake, 'log:clear', sudo: true
       end
@@ -240,7 +240,7 @@ def test_rake_with_sudo_option_should_run_rake_command_with_sudo
   end
 
   def test_rails_command_should_run_rails_command_with_default_env
-    assert_called_with(generator, :run, ["rake log:clear RAILS_ENV=development", verbose: false]) do
+    assert_called_with(generator, :run, ["rails log:clear RAILS_ENV=development", verbose: false]) do
       with_rails_env nil do
         action :rails_command, 'log:clear'
       end
@@ -248,13 +248,13 @@ def test_rails_command_should_run_rails_command_with_default_env
   end
 
   def test_rails_command_with_env_option_should_run_rails_command_in_env
-    assert_called_with(generator, :run, ['rake log:clear RAILS_ENV=production', verbose: false]) do
+    assert_called_with(generator, :run, ['rails log:clear RAILS_ENV=production', verbose: false]) do
       action :rails_command, 'log:clear', env: 'production'
     end
   end
 
   def test_rails_command_with_rails_env_variable_should_run_rails_command_in_env
-    assert_called_with(generator, :run, ['rake log:clear RAILS_ENV=production', verbose: false]) do
+    assert_called_with(generator, :run, ['rails log:clear RAILS_ENV=production', verbose: false]) do
       with_rails_env "production" do
         action :rails_command, 'log:clear'
       end
@@ -262,7 +262,7 @@ def test_rails_command_with_rails_env_variable_should_run_rails_command_in_env
   end
 
   def test_env_option_should_win_over_rails_env_variable_when_running_rails
-    assert_called_with(generator, :run, ['rake log:clear RAILS_ENV=production', verbose: false]) do
+    assert_called_with(generator, :run, ['rails log:clear RAILS_ENV=production', verbose: false]) do
       with_rails_env "staging" do
         action :rails_command, 'log:clear', env: 'production'
       end
@@ -270,7 +270,7 @@ def test_env_option_should_win_over_rails_env_variable_when_running_rails
   end
 
   def test_rails_command_with_sudo_option_should_run_rails_command_with_sudo
-    assert_called_with(generator, :run, ["sudo rake log:clear RAILS_ENV=development", verbose: false]) do
+    assert_called_with(generator, :run, ["sudo rails log:clear RAILS_ENV=development", verbose: false]) do
       with_rails_env nil do
         action :rails_command, 'log:clear', sudo: true
       end