Show rails instead of bin/rails on USAGE instructions

With this commit, rails commands usage instructions display now +rails+
instead of +bin/rails+ within their recommendations.

railties/lib/rails/command/base.rb

@@ -70,7 +70,7 @@ module Rails
         end
 
         def executable
-          "bin/rails #{command_name}"
+          "rails #{command_name}"
         end
 
         # Use Rails' default banner.

railties/lib/rails/test_unit/reporter.rb

@@ -5,7 +5,7 @@ require "minitest"
 
 module Rails
   class TestUnitReporter < Minitest::StatisticsReporter
-    class_attribute :executable, default: "bin/rails test"
+    class_attribute :executable, default: "rails test"
 
     def record(result)
       super

railties/test/application/test_runner_test.rb

@@ -504,7 +504,7 @@ module ApplicationTests
       create_test_file :models, "post", pass: false, print: false
 
       output = run_test_command("test/models/post_test.rb")
-      expect = %r{Running:\n\nF\n\nFailure:\nPostTest#test_truth \[[^\]]+test/models/post_test.rb:6\]:\nwups!\n\nbin/rails test test/models/post_test.rb:4\n\n\n\n}
+      expect = %r{Running:\n\nF\n\nFailure:\nPostTest#test_truth \[[^\]]+test/models/post_test.rb:6\]:\nwups!\n\nrails test test/models/post_test.rb:4\n\n\n\n}
       assert_match expect, output
     end
 

railties/test/commands/dbconsole_test.rb

@@ -265,14 +265,14 @@ class Rails::DBConsoleTest < ActiveSupport::TestCase
     stdout = capture(:stdout) do
       Rails::Command.invoke(:dbconsole, ["-h"])
     end
-    assert_match(/bin\/rails dbconsole \[environment\]/, stdout)
+    assert_match(/rails dbconsole \[environment\]/, stdout)
   end
 
   def test_print_help_long
     stdout = capture(:stdout) do
       Rails::Command.invoke(:dbconsole, ["--help"])
     end
-    assert_match(/bin\/rails dbconsole \[environment\]/, stdout)
+    assert_match(/rails dbconsole \[environment\]/, stdout)
   end
 
   attr_reader :aborted, :output

railties/test/generators/test_runner_in_engine_test.rb

@@ -19,7 +19,7 @@ class TestRunnerInEngineTest < ActiveSupport::TestCase
     create_test_file "post", pass: false
 
     output = run_test_command("test/post_test.rb")
-    expect = %r{Running:\n\nPostTest\nF\n\nFailure:\nPostTest#test_truth \[[^\]]+test/post_test\.rb:6\]:\nwups!\n\nbin/rails test test/post_test\.rb:4}
+    expect = %r{Running:\n\nPostTest\nF\n\nFailure:\nPostTest#test_truth \[[^\]]+test/post_test\.rb:6\]:\nwups!\n\nrails test test/post_test\.rb:4}
     assert_match expect, output
   end
 

railties/test/test_unit/reporter_test.rb

@@ -18,7 +18,7 @@ class TestUnitReporterTest < ActiveSupport::TestCase
     @reporter.record(failed_test)
     @reporter.report
 
-    assert_match %r{^bin/rails test .*test/test_unit/reporter_test\.rb:\d+$}, @output.string
+    assert_match %r{^rails test .*test/test_unit/reporter_test\.rb:\d+$}, @output.string
     assert_rerun_snippet_count 1
   end
 
@@ -64,7 +64,7 @@ class TestUnitReporterTest < ActiveSupport::TestCase
     @reporter.record(failed_test)
     @reporter.report
 
-    expect = %r{\AF\n\nFailure:\nTestUnitReporterTest::ExampleTest#woot \[[^\]]+\]:\nboo\n\nbin/rails test test/test_unit/reporter_test\.rb:\d+\n\n\z}
+    expect = %r{\AF\n\nFailure:\nTestUnitReporterTest::ExampleTest#woot \[[^\]]+\]:\nboo\n\nrails test test/test_unit/reporter_test\.rb:\d+\n\n\z}
     assert_match expect, @output.string
   end
 
@@ -72,7 +72,7 @@ class TestUnitReporterTest < ActiveSupport::TestCase
     @reporter.record(errored_test)
     @reporter.report
 
-    expect = %r{\AE\n\nError:\nTestUnitReporterTest::ExampleTest#woot:\nArgumentError: wups\n    \n\nbin/rails test .*test/test_unit/reporter_test\.rb:\d+\n\n\z}
+    expect = %r{\AE\n\nError:\nTestUnitReporterTest::ExampleTest#woot:\nArgumentError: wups\n    \n\nrails test .*test/test_unit/reporter_test\.rb:\d+\n\n\z}
     assert_match expect, @output.string
   end
 
@@ -81,7 +81,7 @@ class TestUnitReporterTest < ActiveSupport::TestCase
     verbose.record(skipped_test)
     verbose.report
 
-    expect = %r{\ATestUnitReporterTest::ExampleTest#woot = 10\.00 s = S\n\n\nSkipped:\nTestUnitReporterTest::ExampleTest#woot \[[^\]]+\]:\nskipchurches, misstemples\n\nbin/rails test test/test_unit/reporter_test\.rb:\d+\n\n\z}
+    expect = %r{\ATestUnitReporterTest::ExampleTest#woot = 10\.00 s = S\n\n\nSkipped:\nTestUnitReporterTest::ExampleTest#woot \[[^\]]+\]:\nskipchurches, misstemples\n\nrails test test/test_unit/reporter_test\.rb:\d+\n\n\z}
     assert_match expect, @output.string
   end
 
@@ -159,7 +159,7 @@ class TestUnitReporterTest < ActiveSupport::TestCase
 
   private
     def assert_rerun_snippet_count(snippet_count)
-      assert_equal snippet_count, @output.string.scan(%r{^bin/rails test }).size
+      assert_equal snippet_count, @output.string.scan(%r{^rails test }).size
     end
 
     def failed_test