Add RuboCop/Lint-CopDirectiveSyntax.md and RuboCop/Rails-StrongParametersExpect.md

Author: cordis-dev

RuboCop/Lint-CopDirectiveSyntax.md

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+Pattern: Malformed cop directive syntax
+
+Issue: -
+
+## Description
+
+Checks that `# rubocop:enable …​` and `# rubocop:disable …​` statements are strictly formatted.
+
+A comment can be added to the directive by prefixing it with `--`.
+
+## Examples
+
+```ruby
+# bad
+# rubocop:disable Layout/LineLength Style/Encoding
+#                                  ^ missing comma
+
+# bad
+# rubocop:disable
+
+# bad
+# rubocop:disable Layout/LineLength # rubocop:disable Style/Encoding
+
+# bad
+# rubocop:wrongmode Layout/LineLength
+
+# good
+# rubocop:disable Layout/LineLength
+
+# good
+# rubocop:disable Layout/LineLength, Style/Encoding
+
+# good
+# rubocop:disable all
+
+# good
+# rubocop:disable Layout/LineLength -- This is a good comment.
+```
+
+## Further Reading
+
+* [RuboCop - Lint/CopDirectiveSyntax](https://docs.rubocop.org/rubocop/cops_lint.html#lintcopdirectivesyntax)

RuboCop/Rails-StrongParametersExpect.md

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+Pattern: Missing use of `ActionController::Parameters#expect`
+
+Issue: -
+
+## Description
+
+Enforces the use of `ActionController::Parameters#expect` as a method for strong parameter handling.
+
+## Examples
+
+```ruby
+# bad
+params.require(:user).permit(:name, :age)
+params.permit(user: [:name, :age]).require(:user)
+
+# good
+params.expect(user: [:name, :age])
+```
+
+## Further Reading
+
+* [RuboCop - Rails/StrongParametersExpect](https://docs.rubocop.org/rubocop-rails/cops_rails.html#railsstrongparametersexpect)