Fix new rubocop warnings

test/lib/locale_test.rb

@@ -80,7 +80,7 @@ class LocaleTest < ActiveSupport::TestCase
   end
 
   def test_available
-    assert Locale.available.count <= I18n.available_locales.count
+    assert_operator Locale.available.count, :<=, I18n.available_locales.count
   end
 
   def test_preferred

test/lib/password_hash_test.rb

@@ -61,6 +61,6 @@ class PasswordHashTest < ActiveSupport::TestCase
     format = Argon2::HashFormat.new(hash)
 
     assert_equal "argon2id", format.variant
-    assert format.version <= 19
+    assert_operator format.version, :<=, 19
   end
 end

test/lib/short_link_test.rb

@@ -20,7 +20,7 @@ class ShortLinkTest < ActiveSupport::TestCase
       # smaller range.
       distance = Math.sqrt(((lat - lat2)**2) + ((lon - lon2)**2))
       max_distance = 360.0 / (1 << (zoom + 8)) * 0.5 * Math.sqrt(5)
-      assert max_distance > distance, "Maximum expected error exceeded: #{max_distance} <= #{distance} for (#{lat}, #{lon}, #{zoom})."
+      assert_operator max_distance, :>, distance, "Maximum expected error exceeded: #{max_distance} <= #{distance} for (#{lat}, #{lon}, #{zoom})."
     end
   end