[Fix #8783] Disable Style/ArrayCoercion cop by default

Fixes #8783, #8391, and #8334.

This PR disables `Style/ArrayCoercion` cop by default.
Because false positive will occur if the argument of `Array()` is not an array (e.g. Hash, Set),
an array will be returned as an incompatibility result.

CHANGELOG.md

@@ -16,6 +16,7 @@
 
 * [#8785](https://github.com/rubocop-hq/rubocop/pull/8785): Update TargetRubyVersion 2.8 to 3.0 (experimental). ([@koic][])
 * [#8650](https://github.com/rubocop-hq/rubocop/issues/8650): Faster find of hidden files in `TargetFinder` class which improves rubocop initial startup speed. ([@tleish][])
+* [#8783](https://github.com/rubocop-hq/rubocop/pull/8783): Disable `Style/ArrayCoercion` cop by default. ([@koic][])
 
 ## 0.91.1 (2020-09-23)
 

config/default.yml

@@ -2463,7 +2463,7 @@ Style/ArrayCoercion:
                   with a variable you want to treat as an Array, but you're not certain it's an array.
   StyleGuide: '#array-coercion'
   Safe: false
-  Enabled: 'pending'
+  Enabled: false
   VersionAdded: '0.88'
 
 Style/ArrayJoin:

docs/modules/ROOT/pages/cops_style.adoc

@@ -295,7 +295,7 @@ end
 |===
 | Enabled by default | Safe | Supports autocorrection | VersionAdded | VersionChanged
 
-| Pending
+| Disabled
 | No
 | Yes (Unsafe)
 | 0.88
@@ -304,6 +304,10 @@ end
 
 This cop enforces the use of `Array()` instead of explicit `Array` check or `[*var]`.
 
+This cop is disabled by default because false positive will occur if
+the argument of `Array()` is not an array (e.g. Hash, Set),
+an array will be returned as an incompatibility result.
+
 === Examples
 
 [source,ruby]

lib/rubocop/cop/style/array_coercion.rb

@@ -5,6 +5,10 @@ module Cop
     module Style
       # This cop enforces the use of `Array()` instead of explicit `Array` check or `[*var]`.
       #
+      # This cop is disabled by default because false positive will occur if
+      # the argument of `Array()` is not an array (e.g. Hash, Set),
+      # an array will be returned as an incompatibility result.
+      #
       # @example
       #   # bad
       #   paths = [paths] unless paths.is_a?(Array)