Modify RSpec config in spec_helper.

* Allow :focus to be used in tests
* Use documentation format automatically when one file is run

spec/spec_helper.rb

@@ -48,13 +48,14 @@
 
   # The settings below are suggested to provide a good initial experience
   # with RSpec, but feel free to customize to your heart's content.
-  #   # This allows you to limit a spec run to individual examples or groups
-  #   # you care about by tagging them with `:focus` metadata. When nothing
-  #   # is tagged with `:focus`, all examples get run. RSpec also provides
-  #   # aliases for `it`, `describe`, and `context` that include `:focus`
-  #   # metadata: `fit`, `fdescribe` and `fcontext`, respectively.
-  #   config.filter_run_when_matching :focus
-  #
+
+  # This allows you to limit a spec run to individual examples or groups
+  # you care about by tagging them with `:focus` metadata. When nothing
+  # is tagged with `:focus`, all examples get run. RSpec also provides
+  # aliases for `it`, `describe`, and `context` that include `:focus`
+  # metadata: `fit`, `fdescribe` and `fcontext`, respectively.
+  config.filter_run_when_matching :focus
+
   #   # Allows RSpec to persist some state between runs in order to support
   #   # the `--only-failures` and `--next-failure` CLI options. We recommend
   #   # you configure your source control system to ignore this file.
@@ -66,17 +67,17 @@
   #   #   - http://www.teaisaweso.me/blog/2013/05/27/rspecs-new-message-expectation-syntax/
   #   #   - http://rspec.info/blog/2014/05/notable-changes-in-rspec-3/#zero-monkey-patching-mode
   #   config.disable_monkey_patching!
-  #
-  #   # Many RSpec users commonly either run the entire suite or an individual
-  #   # file, and it's useful to allow more verbose output when running an
-  #   # individual spec file.
-  #   if config.files_to_run.one?
-  #     # Use the documentation formatter for detailed output,
-  #     # unless a formatter has already been configured
-  #     # (e.g. via a command-line flag).
-  #     config.default_formatter = "doc"
-  #   end
-  #
+
+  # Many RSpec users commonly either run the entire suite or an individual
+  # file, and it's useful to allow more verbose output when running an
+  # individual spec file.
+  if config.files_to_run.one?
+    # Use the documentation formatter for detailed output,
+    # unless a formatter has already been configured
+    # (e.g. via a command-line flag).
+    config.default_formatter = "doc"
+  end
+
   #   # Print the 10 slowest examples and example groups at the
   #   # end of the spec run, to help surface which specs are running
   #   # particularly slow.