Clarify wide/small table rubocop definitions

rubocop/cop/migration/safer_boolean_column.rb

@@ -37,7 +37,7 @@ module RuboCop
           table, _, type = matched.to_a.take(3).map(&:children).map(&:first)
           opts = matched[3]
 
-          return unless WHITELISTED_TABLES.include?(table) && type == :boolean
+          return unless SMALL_TABLES.include?(table) && type == :boolean
 
           no_default = no_default?(opts)
           nulls_allowed = nulls_allowed?(opts)

rubocop/migration_helpers.rb

 module RuboCop
   # Module containing helper methods for writing migration cops.
   module MigrationHelpers
-    WHITELISTED_TABLES = %i[
+    # Tables with permanently small number of records
+    SMALL_TABLES = %i[
       application_settings
       plan_limits
     ].freeze
 
-    # Blacklisted tables due to:
-    #   - number of columns (> 50 on GitLab.com as of 03/2020)
-    #   - number of records
+    # Tables with large number of columns (> 50 on GitLab.com as of 03/2020)
     WIDE_TABLES = %i[
       users
       projects

spec/rubocop/cop/migration/safer_boolean_column_spec.rb

@@ -14,7 +14,7 @@ RSpec.describe RuboCop::Cop::Migration::SaferBooleanColumn, type: :rubocop do
       allow(cop).to receive(:in_migration?).and_return(true)
     end
 
-    described_class::WHITELISTED_TABLES.each do |table|
+    described_class::SMALL_TABLES.each do |table|
       context "for the #{table} table" do
         sources_and_offense = [
           ["add_column :#{table}, :column, :boolean, default: true", 'should disallow nulls'],
@@ -59,14 +59,14 @@ RSpec.describe RuboCop::Cop::Migration::SaferBooleanColumn, type: :rubocop do
       end
     end
 
-    it 'registers no offense for tables not listed in WHITELISTED_TABLES' do
+    it 'registers no offense for tables not listed in SMALL_TABLES' do
       inspect_source("add_column :large_table, :column, :boolean")
 
       expect(cop.offenses).to be_empty
     end
 
     it 'registers no offense for non-boolean columns' do
-      table = described_class::WHITELISTED_TABLES.sample
+      table = described_class::SMALL_TABLES.sample
       inspect_source("add_column :#{table}, :column, :string")
 
       expect(cop.offenses).to be_empty
@@ -75,7 +75,7 @@ RSpec.describe RuboCop::Cop::Migration::SaferBooleanColumn, type: :rubocop do
 
   context 'outside of migration' do
     it 'registers no offense' do
-      table = described_class::WHITELISTED_TABLES.sample
+      table = described_class::SMALL_TABLES.sample
       inspect_source("add_column :#{table}, :column, :boolean")
 
       expect(cop.offenses).to be_empty