Do not show suggestion message when not exist suggestion

**before**

```
$ ./bin/rails g g
Could not find generator 'g'. Maybe you meant nil?
Run `rails generate --help` for more options.
```

**after**

```
$ ./bin/rails g g
Could not find generator 'g'.
Run `rails generate --help` for more options.
```

2 files changed, 7 insertions, 0 deletions

diff --git a/railties/test/commands/server_test.rb b/railties/test/commands/server_test.rb
index fbdd3f3ebb..25b89ecbd8 100644
--- a/railties/test/commands/server_test.rb
+++ b/railties/test/commands/server_test.rb
@@ -32,6 +32,12 @@ class Rails::Command::ServerCommandTest < ActiveSupport::TestCase
     assert_match(/Could not find server "tin". Maybe you meant "thin"?/, run_command("--using", "tin"))
   end
 
+  def test_using_server_mistype_without_suggestion
+    output = run_command("--using", "t")
+    assert_match(/Could not find server "t"/, output)
+    assert_no_match(/Maybe you meant/, output)
+  end
+
   def test_using_positional_argument_deprecation
     assert_match(/DEPRECATION WARNING/, run_command("tin"))
   end
diff --git a/railties/test/generators_test.rb b/railties/test/generators_test.rb
index f98c1f78f7..abdc04a8d3 100644
--- a/railties/test/generators_test.rb
+++ b/railties/test/generators_test.rb
@@ -28,6 +28,7 @@ class GeneratorsTest < Rails::Generators::TestCase
     output = capture(:stdout) { Rails::Generators.invoke name }
     assert_match "Could not find generator '#{name}'", output
     assert_match "`rails generate --help`", output
+    assert_no_match "Maybe you meant", output
   end
 
   def test_generator_suggestions