Fix misc rubocop warnings.

app/logical/concerns/has_bit_flags.rb

@@ -16,7 +16,7 @@ module HasBitFlags
       end
 
       define_method("#{attribute}=") do |val|
-        if val.to_s =~ /t|1|y/
+        if val.to_s =~ /[t1y]/
           send("#{field}=", send(field) | bit_flag)
         else
           send("#{field}=", send(field) & ~bit_flag)

app/logical/concerns/mentionable.rb

@@ -11,8 +11,6 @@ module Mentionable
     # - user_field
     def mentionable(options = {})
       @mentionable_options = options
-
-      message_field = mentionable_option(:message_field)
       after_save :queue_mention_messages
     end
 

app/logical/concerns/searchable.rb

@@ -89,7 +89,7 @@ module Searchable
   def where_array_count(attr, value)
     qualified_column = "cardinality(#{qualified_column_for(attr)})"
     range = PostQueryBuilder.new(nil).parse_range(value, :integer)
-    where_operator("cardinality(#{qualified_column_for(attr)})", *range)
+    where_operator(qualified_column, *range)
   end
 
   def search_boolean_attribute(attribute, params)
@@ -170,7 +170,7 @@ module Searchable
     end
   end
 
-  def search_text_attribute(attr, params, **options)
+  def search_text_attribute(attr, params)
     if params[attr].present?
       where(attr => params[attr])
     elsif params[:"#{attr}_eq"].present?
@@ -279,7 +279,8 @@ module Searchable
         return find_ordered(parse_ids[1])
       end
     end
-    return default_order
+
+    default_order
   end
 
   def default_order