diff --git a/Gemfile b/Gemfile
index 5080b5af..86aa5831 100644
--- a/Gemfile
+++ b/Gemfile
@@ -5,7 +5,7 @@ source 'https://rubygems.org'
 gem "activesupport", require: false
 gem "parser"
 gem "pry", require: false
-gem "rubocop", "1.36.0", require: false
+gem "rubocop", "1.39.0", require: false
 gem "rubocop-i18n", require: false
 gem "rubocop-graphql", require: false
 gem "rubocop-minitest", require: false
diff --git a/Gemfile.lock b/Gemfile.lock
index 7c289787..0102eb60 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -24,49 +24,49 @@ GEM
     rack (3.0.0)
     rainbow (3.1.1)
     rake (13.0.6)
-    regexp_parser (2.5.0)
+    regexp_parser (2.6.0)
     rexml (3.2.5)
-    rspec (3.11.0)
-      rspec-core (~> 3.11.0)
-      rspec-expectations (~> 3.11.0)
-      rspec-mocks (~> 3.11.0)
-    rspec-core (3.11.0)
-      rspec-support (~> 3.11.0)
-    rspec-expectations (3.11.1)
+    rspec (3.12.0)
+      rspec-core (~> 3.12.0)
+      rspec-expectations (~> 3.12.0)
+      rspec-mocks (~> 3.12.0)
+    rspec-core (3.12.0)
+      rspec-support (~> 3.12.0)
+    rspec-expectations (3.12.0)
       diff-lcs (>= 1.2.0, < 2.0)
-      rspec-support (~> 3.11.0)
-    rspec-mocks (3.11.1)
+      rspec-support (~> 3.12.0)
+    rspec-mocks (3.12.0)
       diff-lcs (>= 1.2.0, < 2.0)
-      rspec-support (~> 3.11.0)
-    rspec-support (3.11.1)
-    rubocop (1.36.0)
+      rspec-support (~> 3.12.0)
+    rspec-support (3.12.0)
+    rubocop (1.39.0)
       json (~> 2.3)
       parallel (~> 1.10)
       parser (>= 3.1.2.1)
       rainbow (>= 2.2.2, < 4.0)
       regexp_parser (>= 1.8, < 3.0)
       rexml (>= 3.2.5, < 4.0)
-      rubocop-ast (>= 1.20.1, < 2.0)
+      rubocop-ast (>= 1.23.0, < 2.0)
       ruby-progressbar (~> 1.7)
       unicode-display_width (>= 1.4.0, < 3.0)
-    rubocop-ast (1.21.0)
+    rubocop-ast (1.23.0)
       parser (>= 3.1.1.0)
-    rubocop-graphql (0.14.6)
+    rubocop-graphql (0.18.0)
       rubocop (>= 0.87, < 2)
     rubocop-i18n (3.0.0)
       rubocop (~> 1.0)
-    rubocop-minitest (0.22.1)
+    rubocop-minitest (0.23.2)
       rubocop (>= 0.90, < 2.0)
     rubocop-performance (1.15.0)
       rubocop (>= 1.7.0, < 2.0)
       rubocop-ast (>= 0.4.0)
-    rubocop-rails (2.16.1)
+    rubocop-rails (2.17.2)
       activesupport (>= 4.2.0)
       rack (>= 1.1)
       rubocop (>= 1.33.0, < 2.0)
     rubocop-rake (0.6.0)
       rubocop (~> 1.0)
-    rubocop-rspec (2.13.2)
+    rubocop-rspec (2.15.0)
       rubocop (~> 1.33)
     rubocop-sequel (0.3.4)
       rubocop (~> 1.0)
@@ -77,7 +77,7 @@ GEM
     rubocop-thread_safety (0.4.4)
       rubocop (>= 0.53.0)
     ruby-progressbar (1.11.0)
-    test-prof (1.0.10)
+    test-prof (1.0.11)
     tzinfo (2.0.5)
       concurrent-ruby (~> 1.0)
     unicode-display_width (2.3.0)
@@ -91,7 +91,7 @@ DEPENDENCIES
   pry
   rake
   rspec
-  rubocop (= 1.36.0)
+  rubocop (= 1.39.0)
   rubocop-graphql
   rubocop-i18n
   rubocop-minitest
diff --git a/config/contents/layout/space_inside_array_percent_literal.md b/config/contents/layout/space_inside_array_percent_literal.md
index aa8256c2..36d851e5 100644
--- a/config/contents/layout/space_inside_array_percent_literal.md
+++ b/config/contents/layout/space_inside_array_percent_literal.md
@@ -1,6 +1,9 @@
 Checks for unnecessary additional spaces inside array percent literals
 (i.e. %i/%w).
 
+Note that blank percent literals (e.g. `%i( )`) are checked by
+`Layout/SpaceInsidePercentLiteralDelimiters`.
+
 ### Example:
 
     # bad
diff --git a/config/contents/layout/space_inside_hash_literal_braces.md b/config/contents/layout/space_inside_hash_literal_braces.md
index d9e48b24..af63a47a 100644
--- a/config/contents/layout/space_inside_hash_literal_braces.md
+++ b/config/contents/layout/space_inside_hash_literal_braces.md
@@ -41,10 +41,13 @@ surrounding space depending on configuration.
     # bad
     foo = { }
     bar = {    }
+    baz = {
+    }
 
     # good
     foo = {}
     bar = {}
+    baz = {}
 
 ### Example: EnforcedStyleForEmptyBraces: space
     # The `space` EnforcedStyleForEmptyBraces style enforces that
@@ -55,5 +58,6 @@ surrounding space depending on configuration.
 
     # good
     foo = { }
-    foo = {  }
-    foo = {     }
+    foo = {    }
+    foo = {
+    }
diff --git a/config/contents/layout/space_inside_percent_literal_delimiters.md b/config/contents/layout/space_inside_percent_literal_delimiters.md
index 54bf6fd8..b4c9e83c 100644
--- a/config/contents/layout/space_inside_percent_literal_delimiters.md
+++ b/config/contents/layout/space_inside_percent_literal_delimiters.md
@@ -3,11 +3,28 @@ Checks for unnecessary additional spaces inside the delimiters of
 
 ### Example:
 
+    # bad
+    %i( foo bar baz )
+
     # good
     %i(foo bar baz)
 
     # bad
     %w( foo bar baz )
 
+    # good
+    %w(foo bar baz)
+
+    # bad
+    %x(  ls -l )
+
+    # good
+    %x(ls -l)
+
     # bad
-    %x(  ls -l )
\ No newline at end of file
+    %w( )
+    %w(
+    )
+
+    # good
+    %w()
\ No newline at end of file
diff --git a/config/contents/layout/space_inside_reference_brackets.md b/config/contents/layout/space_inside_reference_brackets.md
index 8ee084ed..6e8e03df 100644
--- a/config/contents/layout/space_inside_reference_brackets.md
+++ b/config/contents/layout/space_inside_reference_brackets.md
@@ -33,6 +33,8 @@ surrounding space depending on configuration.
     # bad
     foo[ ]
     foo[     ]
+    foo[
+    ]
 
     # good
     foo[]
@@ -44,6 +46,8 @@ surrounding space depending on configuration.
     # bad
     foo[]
     foo[    ]
+    foo[
+    ]
 
     # good
     foo[ ]
diff --git a/config/contents/lint/ambiguous_block_association.md b/config/contents/lint/ambiguous_block_association.md
index 299e6beb..f7baee73 100644
--- a/config/contents/lint/ambiguous_block_association.md
+++ b/config/contents/lint/ambiguous_block_association.md
@@ -40,7 +40,7 @@ By default, there are no methods to allowed.
     # bad
     expect { do_something }.to change { object.attribute }
 
-### Example: AllowedPatterns: [/change/]
+### Example: AllowedPatterns: ['change']
 
     # good
     expect { do_something }.to change { object.attribute }
diff --git a/config/contents/lint/duplicate_magic_comment.md b/config/contents/lint/duplicate_magic_comment.md
new file mode 100644
index 00000000..b6122cca
--- /dev/null
+++ b/config/contents/lint/duplicate_magic_comment.md
@@ -0,0 +1,21 @@
+Checks for duplicated magic comments.
+
+### Example:
+
+    # bad
+
+    # encoding: ascii
+    # encoding: ascii
+
+    # good
+
+    # encoding: ascii
+
+    # bad
+
+    # frozen_string_literal: true
+    # frozen_string_literal: true
+
+    # good
+
+    # frozen_string_literal: true
diff --git a/config/contents/lint/nested_method_definition.md b/config/contents/lint/nested_method_definition.md
index 0ec82667..e69ae3de 100644
--- a/config/contents/lint/nested_method_definition.md
+++ b/config/contents/lint/nested_method_definition.md
@@ -25,6 +25,9 @@ Checks for nested method definitions.
 
     # good
 
+    # `class_eval`, `instance_eval`, `module_eval`, `class_exec`, `instance_exec`, and
+    # `module_exec` blocks are allowed by default.
+
     def foo
       self.class.class_eval do
         def bar
@@ -48,4 +51,40 @@ Checks for nested method definitions.
         def bar
         end
       end
-    end
\ No newline at end of file
+    end
+
+### Example: AllowedMethods: [] (default)
+    # bad
+    def do_something
+      has_many :articles do
+        def find_or_create_by_name(name)
+        end
+      end
+    end
+
+### Example: AllowedMethods: ['has_many']
+    # bad
+    def do_something
+      has_many :articles do
+        def find_or_create_by_name(name)
+        end
+      end
+    end
+
+### Example: AllowedPatterns: [] (default)
+    # bad
+    def foo(obj)
+      obj.do_baz do
+        def bar
+        end
+      end
+    end
+
+### Example: AllowedPatterns: ['baz']
+    # good
+    def foo(obj)
+      obj.do_baz do
+        def bar
+        end
+      end
+    end
diff --git a/config/contents/lint/number_conversion.md b/config/contents/lint/number_conversion.md
index e4754c70..f0a50c38 100644
--- a/config/contents/lint/number_conversion.md
+++ b/config/contents/lint/number_conversion.md
@@ -57,7 +57,7 @@ input if it is not a standard class.
     # bad
     10.minutes.to_i
 
-### Example: AllowedPatterns: [/min*/]
+### Example: AllowedPatterns: ['min*']
 
     # good
     10.minutes.to_i
diff --git a/config/contents/lint/ordered_magic_comments.md b/config/contents/lint/ordered_magic_comments.md
index c857fd41..fc2c19ac 100644
--- a/config/contents/lint/ordered_magic_comments.md
+++ b/config/contents/lint/ordered_magic_comments.md
@@ -2,6 +2,10 @@
 Checks the proper ordering of magic comments and whether
 a magic comment is not placed before a shebang.
 
+### Safety:
+
+This cop's autocorrection is unsafe because file encoding may change.
+
 ### Example:
     # bad
 
diff --git a/config/contents/lint/out_of_range_regexp_ref.md b/config/contents/lint/out_of_range_regexp_ref.md
index e476b8c3..7c282ab7 100644
--- a/config/contents/lint/out_of_range_regexp_ref.md
+++ b/config/contents/lint/out_of_range_regexp_ref.md
@@ -1,4 +1,4 @@
-This cops looks for references of Regexp captures that are out of range
+Looks for references of Regexp captures that are out of range
 and thus always returns nil.
 
 ### Safety:
diff --git a/config/contents/lint/redundant_require_statement.md b/config/contents/lint/redundant_require_statement.md
index 46ab7f0f..a01a22f8 100644
--- a/config/contents/lint/redundant_require_statement.md
+++ b/config/contents/lint/redundant_require_statement.md
@@ -1,13 +1,23 @@
 Checks for unnecessary `require` statement.
 
 The following features are unnecessary `require` statement because
-they are already loaded.
+they are already loaded. e.g. Ruby 2.2:
 
     ruby -ve 'p $LOADED_FEATURES.reject { |feature| %r|/| =~ feature }'
     ruby 2.2.8p477 (2017-09-14 revision 59906) [x86_64-darwin13]
     ["enumerator.so", "rational.so", "complex.so", "thread.rb"]
 
-This cop targets Ruby 2.2 or higher containing these 4 features.
+Below are the features that each `TargetRubyVersion` targets.
+
+    * 2.0+ ... `enumerator`
+    * 2.1+ ... `thread`
+    * 2.2+ ... Add `rational` and `complex` above
+    * 2.5+ ... Add `pp` above
+    * 2.7+ ... Add `ruby2_keywords` above
+    * 3.1+ ... Add `fiber` above
+    * 3.2+ ... `set`
+
+This cop target those features.
 
 ### Example:
     # bad
diff --git a/config/contents/lint/shadowing_outer_local_variable.md b/config/contents/lint/shadowing_outer_local_variable.md
index a778f3f0..04353df3 100644
--- a/config/contents/lint/shadowing_outer_local_variable.md
+++ b/config/contents/lint/shadowing_outer_local_variable.md
@@ -7,9 +7,11 @@ NOTE: Shadowing of variables in block passed to `Ractor.new` is allowed
 because `Ractor` should not access outer variables.
 eg. following style is encouraged:
 
+    ```ruby
     worker_id, pipe = env
     Ractor.new(worker_id, pipe) do |worker_id, pipe|
     end
+    ```
 
 ### Example:
 
diff --git a/config/contents/lint/unreachable_loop.md b/config/contents/lint/unreachable_loop.md
index 961c9ea9..c635f9c5 100644
--- a/config/contents/lint/unreachable_loop.md
+++ b/config/contents/lint/unreachable_loop.md
@@ -74,7 +74,7 @@ code that would otherwise be registered as an offense (eg. `times` used not in a
     # bad
     2.times { raise ArgumentError }
 
-### Example: AllowedPatterns: [/(exactly|at_least|at_most)\(\d+\)\.times/] (default)
+### Example: AllowedPatterns: ['(exactly|at_least|at_most)\(\d+\)\.times'] (default)
 
     # good
     exactly(2).times { raise StandardError }
\ No newline at end of file
diff --git a/config/contents/metrics/abc_size.md b/config/contents/metrics/abc_size.md
index f010753a..ab4ed720 100644
--- a/config/contents/metrics/abc_size.md
+++ b/config/contents/metrics/abc_size.md
@@ -15,7 +15,7 @@ is meant to distinguish actual `attr_reader` from other methods.
 
 ### Example: CountRepeatedAttributes: false (default is true)
 
-     # `model` and `current_user`, refenced 3 times each,
+     # `model` and `current_user`, referenced 3 times each,
      # are each counted as only 1 branch each if
      # `CountRepeatedAttributes` is set to 'false'
 
diff --git a/config/contents/naming/inclusive_language.md b/config/contents/naming/inclusive_language.md
index b1c1e6e9..7ad5c834 100644
--- a/config/contents/naming/inclusive_language.md
+++ b/config/contents/naming/inclusive_language.md
@@ -1,4 +1,4 @@
-This cops recommends the use of inclusive language instead of problematic terms.
+Recommends the use of inclusive language instead of problematic terms.
 The cop can check the following locations for offenses:
 - identifiers
 - constants
diff --git a/config/contents/style/block_delimiters.md b/config/contents/style/block_delimiters.md
index 7d77ec31..51505f77 100644
--- a/config/contents/style/block_delimiters.md
+++ b/config/contents/style/block_delimiters.md
@@ -151,7 +151,7 @@ Additional methods can be added to the `AllowedMethods`.
       process(something)
     }
 
-### Example: AllowedPatterns: [/map/]
+### Example: AllowedPatterns: ['map']
 
     # good
     things.map { |thing|
diff --git a/config/contents/style/class_equality_comparison.md b/config/contents/style/class_equality_comparison.md
index 693ec1f0..65928cb0 100644
--- a/config/contents/style/class_equality_comparison.md
+++ b/config/contents/style/class_equality_comparison.md
@@ -43,7 +43,7 @@ These are customizable with `AllowedMethods` option.
     var.class.eql?(Date)
     var.class.name == 'Date'
 
-### Example: AllowedPatterns: [`/eq/`]
+### Example: AllowedPatterns: ['eq']
     # good
     var.instance_of?(Date)
     var.class.equal?(Date)
diff --git a/config/contents/style/collection_compact.md b/config/contents/style/collection_compact.md
index 1212f056..f7bc8ccc 100644
--- a/config/contents/style/collection_compact.md
+++ b/config/contents/style/collection_compact.md
@@ -4,7 +4,9 @@ and hashes can be replaced with `{Array,Hash}#{compact,compact!}`.
 ### Safety:
 
 It is unsafe by default because false positives may occur in the
-`nil` check of block arguments to the receiver object.
+`nil` check of block arguments to the receiver object. Additionally,
+ we can't know the type of the receiver object for sure, which may
+ result in false positives as well.
 
 For example, `[[1, 2], [3, nil]].reject { |first, second| second.nil? }`
 and `[[1, 2], [3, nil]].compact` are not compatible. This will work fine
diff --git a/config/contents/style/endless_method.md b/config/contents/style/endless_method.md
index 751b978e..9c650804 100644
--- a/config/contents/style/endless_method.md
+++ b/config/contents/style/endless_method.md
@@ -34,7 +34,7 @@ corrected to a multi-line definition.
 
 ### Example: EnforcedStyle: disallow
     # bad
-    def my_method; x end
+    def my_method() = x
 
     # bad
     def my_method() = x.foo
diff --git a/config/contents/style/format_string_token.md b/config/contents/style/format_string_token.md
index fd72652e..132e186e 100644
--- a/config/contents/style/format_string_token.md
+++ b/config/contents/style/format_string_token.md
@@ -72,7 +72,7 @@ if the number of them is less than or equals to
     # bad
     redirect('foo/%{bar_id}')
 
-### Example: AllowedPatterns: [/redirect/]
+### Example: AllowedPatterns: ['redirect']
 
     # good
     redirect('foo/%{bar_id}')
diff --git a/config/contents/style/guard_clause.md b/config/contents/style/guard_clause.md
index c0b38d60..87d8409e 100644
--- a/config/contents/style/guard_clause.md
+++ b/config/contents/style/guard_clause.md
@@ -5,6 +5,9 @@ A condition with an `elsif` or `else` branch is allowed unless
 one of `return`, `break`, `next`, `raise`, or `fail` is used
 in the body of the conditional expression.
 
+NOTE: Autocorrect works in most cases except with if-else statements
+    that contain logical operators such as `foo || raise('exception')`
+
 ### Example:
     # bad
     def test
diff --git a/config/contents/style/hash_except.md b/config/contents/style/hash_except.md
index 5a53691c..ab9b2cf1 100644
--- a/config/contents/style/hash_except.md
+++ b/config/contents/style/hash_except.md
@@ -8,6 +8,11 @@ For safe detection, it is limited to commonly used string and symbol comparisons
 when used `==`.
 And do not check `Hash#delete_if` and `Hash#keep_if` to change receiver object.
 
+### Safety:
+
+This cop is unsafe because it cannot be guaranteed that the receiver
+is a `Hash` or responds to the replacement method.
+
 ### Example:
 
     # bad
diff --git a/config/contents/style/hash_syntax.md b/config/contents/style/hash_syntax.md
index c77beee6..0d3c3637 100644
--- a/config/contents/style/hash_syntax.md
+++ b/config/contents/style/hash_syntax.md
@@ -23,7 +23,7 @@ The supported styles are:
 * always - forces use of the 3.1 syntax (e.g. {foo:})
 * never - forces use of explicit hash literal value
 * either - accepts both shorthand and explicit use of hash literal value
-* consistent - like "always", but will avoid mixing styles in a single hash
+* consistent - like "either", but will avoid mixing styles in a single hash
 
 ### Example: EnforcedStyle: ruby19 (default)
     # bad
diff --git a/config/contents/style/if_with_boolean_literal_branches.md b/config/contents/style/if_with_boolean_literal_branches.md
index 8caf3365..14cb25a4 100644
--- a/config/contents/style/if_with_boolean_literal_branches.md
+++ b/config/contents/style/if_with_boolean_literal_branches.md
@@ -1,9 +1,25 @@
 Checks for redundant `if` with boolean literal branches.
 It checks only conditions to return boolean value (`true` or `false`) for safe detection.
-The conditions to be checked are comparison methods, predicate methods, and double negative.
+The conditions to be checked are comparison methods, predicate methods, and
+double negation (!!).
 `nonzero?` method is allowed by default.
 These are customizable with `AllowedMethods` option.
 
+This cop targets only `if`s with a single `elsif` or `else` branch. The following
+code will be allowed, because it has two `elsif` branches:
+
+```ruby
+if foo
+  true
+elsif bar > baz
+  true
+elsif qux > quux # Single `elsif` is warned, but two or more `elsif`s are not.
+  true
+else
+  false
+end
+```
+
 ### Safety:
 
 Autocorrection is unsafe because there is no guarantee that all predicate methods
diff --git a/config/contents/style/module_function.md b/config/contents/style/module_function.md
index e402b20e..0de186bc 100644
--- a/config/contents/style/module_function.md
+++ b/config/contents/style/module_function.md
@@ -1,10 +1,12 @@
-Checks for use of `extend self` or `module_function` in a
-module.
+Checks for use of `extend self` or `module_function` in a module.
 
-Supported styles are: module_function, extend_self, forbidden. `forbidden`
-style prohibits the usage of both styles.
+Supported styles are: `module_function` (default), `extend_self` and `forbidden`.
 
-NOTE: the cop won't be activated when the module contains any private methods.
+A couple of things to keep in mind:
+
+- `forbidden` style prohibits the usage of both styles
+- in default mode (`module_function`), the cop won't be activated when the module
+    contains any private methods
 
 ### Safety:
 
@@ -24,7 +26,6 @@ and `module_function` do not behave exactly the same.
       # ...
     end
 
-### Example: EnforcedStyle: module_function (default)
     # good
     module Test
       extend self
@@ -33,6 +34,13 @@ and `module_function` do not behave exactly the same.
       # ...
     end
 
+    # good
+    module Test
+      class << self
+        # ...
+      end
+    end
+
 ### Example: EnforcedStyle: extend_self
     # bad
     module Test
@@ -46,6 +54,13 @@ and `module_function` do not behave exactly the same.
       # ...
     end
 
+    # good
+    module Test
+      class << self
+        # ...
+      end
+    end
+
 ### Example: EnforcedStyle: forbidden
     # bad
     module Test
@@ -65,4 +80,11 @@ and `module_function` do not behave exactly the same.
       # ...
       private
       # ...
+    end
+
+    # good
+    module Test
+      class << self
+        # ...
+      end
     end
\ No newline at end of file
diff --git a/config/contents/style/numeric_predicate.md b/config/contents/style/numeric_predicate.md
index 03414c9a..50902e37 100644
--- a/config/contents/style/numeric_predicate.md
+++ b/config/contents/style/numeric_predicate.md
@@ -62,7 +62,7 @@ to a false positive for non-standard classes.
     foo.negative?
     bar.baz.positive?
 
-### Example: AllowedPatterns: [/zero/] with EnforcedStyle: predicate
+### Example: AllowedPatterns: ['zero'] with EnforcedStyle: predicate
     # good
     # bad
     foo.zero?
diff --git a/config/contents/style/operator_method_call.md b/config/contents/style/operator_method_call.md
new file mode 100644
index 00000000..57ff738b
--- /dev/null
+++ b/config/contents/style/operator_method_call.md
@@ -0,0 +1,13 @@
+Checks for redundant dot before operator method call.
+The target operator methods are `|`, `^`, `&`, `<=>`, `==`, `===`, `=~`, `>`, `>=`, `<`,
+`<=`, `<<`, `>>`, `+`, `-`, `*`, `/`, `%`, `**`, `~`, `!`, `!=`, and `!~`.
+
+### Example:
+
+    # bad
+    foo.+ bar
+    foo.& bar
+
+    # good
+    foo + bar
+    foo & bar
diff --git a/config/contents/style/redundant_each.md b/config/contents/style/redundant_each.md
new file mode 100644
index 00000000..9f87295b
--- /dev/null
+++ b/config/contents/style/redundant_each.md
@@ -0,0 +1,28 @@
+Checks for redundant `each`.
+
+### Safety:
+
+This cop is unsafe, as it can produce false positives if the receiver
+is not an `Enumerator`.
+
+### Example:
+
+    # bad
+    array.each.each { |v| do_something(v) }
+
+    # good
+    array.each { |v| do_something(v) }
+
+    # bad
+    array.each.each_with_index { |v, i| do_something(v, i) }
+
+    # good
+    array.each.with_index { |v, i| do_something(v, i) }
+    array.each_with_index { |v, i| do_something(v, i) }
+
+    # bad
+    array.each.each_with_object { |v, o| do_something(v, o) }
+
+    # good
+    array.each.with_object { |v, o| do_something(v, o) }
+    array.each_with_object { |v, o| do_something(v, o) }
diff --git a/config/contents/style/redundant_string_escape.md b/config/contents/style/redundant_string_escape.md
new file mode 100644
index 00000000..1de2a158
--- /dev/null
+++ b/config/contents/style/redundant_string_escape.md
@@ -0,0 +1,31 @@
+Checks for redundant escapes in string literals.
+
+### Example:
+    # bad - no need to escape # without following {/$/@
+    "\#foo"
+
+    # bad - no need to escape single quotes inside double quoted string
+    "\'foo\'"
+
+    # bad - heredocs are also checked for unnecessary escapes
+    <<~STR
+      \#foo \"foo\"
+    STR
+
+    # good
+    "#foo"
+
+    # good
+    "\#{no_interpolation}"
+
+    # good
+    "'foo'"
+
+    # good
+    "foo\
+    bar"
+
+    # good
+    <<~STR
+      #foo "foo"
+    STR
\ No newline at end of file
diff --git a/config/contents/style/rescue_modifier.md b/config/contents/style/rescue_modifier.md
index ea3f4bb1..2215d4de 100644
--- a/config/contents/style/rescue_modifier.md
+++ b/config/contents/style/rescue_modifier.md
@@ -4,7 +4,7 @@ The cop to check `rescue` in its modifier form is added for following
 reasons:
 
 * The syntax of modifier form `rescue` can be misleading because it
-    might led us to believe that `rescue` handles the given exception
+    might lead us to believe that `rescue` handles the given exception
     but it actually rescue all exceptions to return the given rescue
     block. In this case, value returned by handle_error or
     SomeException.
diff --git a/config/contents/style/symbol_proc.md b/config/contents/style/symbol_proc.md
index 1317e26b..52e70076 100644
--- a/config/contents/style/symbol_proc.md
+++ b/config/contents/style/symbol_proc.md
@@ -77,6 +77,6 @@ call(&:bar)
     # bad
     something.map { |s| s.upcase }
 
-### Example: AllowedPatterns: [/map/] (default)
+### Example: AllowedPatterns: ['map'] (default)
     # good
     something.map { |s| s.upcase }
diff --git a/lib/cc/engine/source_file.rb b/lib/cc/engine/source_file.rb
index dd1ef264..31be980a 100644
--- a/lib/cc/engine/source_file.rb
+++ b/lib/cc/engine/source_file.rb
@@ -24,7 +24,10 @@ def inspect
       attr_reader :config_store, :io, :path, :root
 
       def processed_source
-        RuboCop::ProcessedSource.from_file(path, target_ruby_version)
+        processed_source = RuboCop::ProcessedSource.from_file(path, target_ruby_version)
+        processed_source.config = config_store if processed_source.respond_to?(:config=)
+        processed_source.registry = RuboCop::Cop::Cop.registry if processed_source.respond_to?(:registry=)
+        processed_source
       end
 
       def target_ruby_version