Update to RSpec 4-compatible syntax

Author: sferik

.rspec

@@ -1,2 +1 @@
---color
 --require spec_helper

spec/spec_helper.rb

@@ -7,51 +7,7 @@
 
 # See http://rubydoc.info/gems/rspec-core/RSpec/Core/Configuration
 RSpec.configure do |config|
-  config.expect_with :rspec do |expectations|
-    # This option will default to `true` in RSpec 4. It makes the `description`
-    # and `failure_message` of custom matchers include text for helper methods
-    # defined using `chain`, e.g.:
-    # be_bigger_than(2).and_smaller_than(4).description
-    #   # => "be bigger than 2 and smaller than 4"
-    # ...rather than:
-    #   # => "be bigger than 2"
-    expectations.include_chain_clauses_in_custom_matcher_descriptions = true
-  end
-
-  config.mock_with :rspec do |mocks|
-    # Prevents you from mocking or stubbing a method that does not exist on
-    # a real object. This is generally recommended, and will default to
-    # `true` in RSpec 4.
-    mocks.verify_partial_doubles = true
-  end
-
-  # These two settings work together to allow 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.
-  config.filter_run :focus
-  config.run_all_when_everything_filtered = true
-
-  # Limits the available syntax to the non-monkey patched syntax that is
-  # recommended. For more details, see:
-  #   - http://myronmars.to/n/dev-blog/2012/06/rspecs-new-expectation-syntax
-  #   - http://teaisaweso.me/blog/2013/05/27/rspecs-new-message-expectation-syntax/
-  #   - http://myronmars.to/n/dev-blog/2014/05/notable-changes-in-rspec-3#new__config_option_to_disable_rspeccore_monkey_patching
-  config.disable_monkey_patching!
-
-  # This setting enables warnings. It's recommended, but in some cases may
-  # be too noisy due to issues in dependencies.
-  config.warnings = true
-
-  # 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
+  config.warnings = :all
 
   # Print the 10 slowest examples and example groups at the
   # end of the spec run, to help surface which specs are running