Mark RSpec/RedundantPredicateMatcher as Safe: false

`RSpec/RedundantPredicateMatcher` cop is marked as unsafe because false positives occur
when `be_start_with` is used as a legitimate predicate matcher for `start_with?` method.

e.g., rubocop/rubocop-ast@f9e6682

CHANGELOG.md

@@ -2,6 +2,8 @@
 
 ## Master (Unreleased)
 
+- Mark `RSpec/RedundantPredicateMatcher` as `Safe: false`. ([@koic])
+
 ## 2.26.1 (2024-01-05)
 
 - Fix an error for `RSpec/SharedExamples` when using examples without argument. ([@ydah])

config/default.yml

@@ -774,6 +774,7 @@ RSpec/RedundantAround:
 RSpec/RedundantPredicateMatcher:
   Description: Checks for redundant predicate matcher.
   Enabled: pending
+  Safe: false
   VersionAdded: '2.26'
   Reference: https://www.rubydoc.info/gems/rubocop-rspec/RuboCop/Cop/RSpec/RedundantPredicateMatcher
 

docs/modules/ROOT/pages/cops_rspec.adoc

@@ -4500,14 +4500,20 @@ end
 | Enabled by default | Safe | Supports autocorrection | Version Added | Version Changed
 
 | Pending
-| Yes
-| Yes
+| No
+| Yes (Unsafe)
 | 2.26
 | -
 |===
 
 Checks for redundant predicate matcher.
 
+=== Safety
+
+This cop is marked as unsafe because false positives occur
+when `be_start_with` is used as a legitimate predicate matcher
+for `start_with?` method.
+
 === Examples
 
 [source,ruby]

lib/rubocop/cop/rspec/redundant_predicate_matcher.rb

@@ -5,6 +5,11 @@ module Cop
     module RSpec
       # Checks for redundant predicate matcher.
       #
+      # @safety
+      #   This cop is marked as unsafe because false positives occur
+      #   when `be_start_with` is used as a legitimate predicate matcher
+      #   for `start_with?` method.
+      #
       # @example
       #   # bad
       #   expect(foo).to be_exist(bar)