Did you mean functionality.

.rubocop_rspec_base.yml

@@ -1,4 +1,4 @@
-# This file was generated on 2019-01-03T20:34:23+00:00 from the rspec-dev repo.
+# This file was generated on 2019-01-08T11:28:05+00:00 from the rspec-dev repo.
 # DO NOT modify it by hand as your changes will get lost the next time it is generated.
 
 # This file contains defaults for RSpec projects. Individual projects

.travis.yml

@@ -1,4 +1,4 @@
-# This file was generated on 2019-01-03T20:34:23+00:00 from the rspec-dev repo.
+# This file was generated on 2019-01-08T11:28:05+00:00 from the rspec-dev repo.
 # DO NOT modify it by hand as your changes will get lost the next time it is generated.
 
 language: ruby
@@ -40,7 +40,6 @@ matrix:
     - rvm: jruby-head
     - rvm: ruby-head
     - rvm: rbx-3
-    - rvm: ruby-2.6.0-preview1
   fast_finish: true
 branches:
   only:

appveyor.yml

@@ -1,4 +1,4 @@
-# This file was generated on 2019-01-03T20:34:23+00:00 from the rspec-dev repo.
+# This file was generated on 2019-01-08T11:28:05+00:00 from the rspec-dev repo.
 # DO NOT modify it by hand as your changes will get lost the next time it is generated.
 
 version: "{build}"

lib/rspec/core.rb

@@ -139,6 +139,7 @@ def self.world
   module Core
     autoload :ExampleStatusPersister, "rspec/core/example_status_persister"
     autoload :Profiler,               "rspec/core/profiler"
+    autoload :DidYouMean,             "rspec/core/did_you_mean"
 
     # @private
     # This avoids issues with reporting time caused by examples that

lib/rspec/core/configuration.rb

@@ -2032,6 +2032,11 @@ def bisect_runner_class
 
       def load_file_handling_errors(method, file)
         __send__(method, file)
+      rescue LoadError => ex
+        relative_file = Metadata.relative_path(file)
+        suggestions = DidYouMean.new(relative_file).call
+        reporter.notify_non_example_exception(ex, "An error occurred while loading #{relative_file}.#{suggestions}")
+        RSpec.world.wants_to_quit = true
       rescue Support::AllExceptionsExceptOnesWeMustNotRescue => ex
         relative_file = Metadata.relative_path(file)
         reporter.notify_non_example_exception(ex, "An error occurred while loading #{relative_file}.")

lib/rspec/core/did_you_mean.rb

@@ -0,0 +1,46 @@
+module RSpec
+  module Core
+    # @private
+    # Wrapper around Ruby's `DidYouMean::SpellChecker` when available to provide file name suggestions.
+    class DidYouMean
+      attr_reader :relative_file_name
+
+      def initialize(relative_file_name)
+        @relative_file_name = relative_file_name
+      end
+
+      if defined?(::DidYouMean::SpellChecker)
+        # provide probable suggestions
+        def call
+          checker = ::DidYouMean::SpellChecker.new(:dictionary => Dir["spec/**/*.rb"])
+          probables = checker.correct(relative_file_name.sub('./', ''))[0..2]
+          return '' unless probables.any?
+
+          formats probables
+        end
+      else
+        # return a hint if API for ::DidYouMean::SpellChecker not supported
+        def call
+          "\nHint: Install the `did_you_mean` gem in order to provide suggestions for similarly named files."
+        end
+      end
+
+      private
+
+      def formats(probables)
+        rspec_format = probables.map { |s, _| "rspec ./#{s}" }
+        red_font(top_and_tail rspec_format)
+      end
+
+      def top_and_tail(rspec_format)
+        spaces = ' ' * 20
+        rspec_format.insert(0, ' - Did you mean?').join("\n#{spaces}") + "\n"
+      end
+
+      def red_font(mytext)
+        colorizer = ::RSpec::Core::Formatters::ConsoleCodes
+        colorizer.wrap mytext, :failure
+      end
+    end
+  end
+end

script/clone_all_rspec_repos

@@ -1,5 +1,5 @@
 #!/bin/bash
-# This file was generated on 2019-01-03T20:34:23+00:00 from the rspec-dev repo.
+# This file was generated on 2019-01-08T11:28:05+00:00 from the rspec-dev repo.
 # DO NOT modify it by hand as your changes will get lost the next time it is generated.
 
 set -e

script/functions.sh

@@ -1,4 +1,4 @@
-# This file was generated on 2019-01-03T20:34:23+00:00 from the rspec-dev repo.
+# This file was generated on 2019-01-08T11:28:05+00:00 from the rspec-dev repo.
 # DO NOT modify it by hand as your changes will get lost the next time it is generated.
 
 SCRIPT_DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"

script/predicate_functions.sh

@@ -1,4 +1,4 @@
-# This file was generated on 2019-01-03T20:34:23+00:00 from the rspec-dev repo.
+# This file was generated on 2019-01-08T11:28:05+00:00 from the rspec-dev repo.
 # DO NOT modify it by hand as your changes will get lost the next time it is generated.
 
 function is_mri {

script/run_build

@@ -1,5 +1,5 @@
 #!/bin/bash
-# This file was generated on 2019-01-03T20:34:23+00:00 from the rspec-dev repo.
+# This file was generated on 2019-01-08T11:28:05+00:00 from the rspec-dev repo.
 # DO NOT modify it by hand as your changes will get lost the next time it is generated.
 
 set -e

script/travis_functions.sh

@@ -1,4 +1,4 @@
-# This file was generated on 2019-01-03T20:34:23+00:00 from the rspec-dev repo.
+# This file was generated on 2019-01-08T11:28:05+00:00 from the rspec-dev repo.
 # DO NOT modify it by hand as your changes will get lost the next time it is generated.
 
 # Taken from:

script/update_rubygems_and_install_bundler

@@ -1,5 +1,5 @@
 #!/bin/bash
-# This file was generated on 2019-01-03T20:34:23+00:00 from the rspec-dev repo.
+# This file was generated on 2019-01-08T11:28:05+00:00 from the rspec-dev repo.
 # DO NOT modify it by hand as your changes will get lost the next time it is generated.
 
 set -e

spec/rspec/core/did_you_mean_spec.rb

@@ -0,0 +1,39 @@
+module RSpec
+  module Core
+    RSpec.describe DidYouMean do
+      describe '#call' do
+        if defined?(::DidYouMean::SpellChecker)
+          context "when `DidYouMean::SpellChecker` is available", :skip => !defined?(::DidYouMean::SpellChecker) do
+            context 'Success' do
+              let(:name) { './spec/rspec/core/did_you_mean_spec.rb' }
+              it 'returns a useful suggestion' do
+                expect(DidYouMean.new(name[0..-2]).call).to include name
+              end
+              context 'numerous possibilities' do
+                it 'returns a small number of suggestions' do
+                  name = './spec/rspec/core/drb_spec.r'
+                  suggestions = DidYouMean.new(name).call
+                  expect(suggestions.split("\n").size).to eq 4
+                end
+              end
+            end
+            context 'No suitable suggestions' do
+              it 'returns empty string' do
+                name = './' + 'x' * 50
+                expect(DidYouMean.new(name).call).to eq ''
+              end
+            end
+          end
+          context "when `DidYouMean::SpellChecker` is not available", :unless => defined?(::DidYouMean::SpellChecker) do
+            describe 'Success' do
+              let(:name) { './spec/rspec/core/did_you_mean_spec.rb' }
+              it 'returns a hint' do
+                expect(DidYouMean.new(name[0..-2]).call).to include 'Hint:'
+              end
+            end
+          end
+        end
+      end
+    end
+  end
+end