Fix some Rubocop violations

Author: rastating

lib/wpxf/utility/text.rb

@@ -40,11 +40,11 @@ def self.rand_alpha(length, casing = :mixed)
       # @return [Array] a range of alpha characters in the matching casing.
       def self.alpha_ranges(casing)
         if casing == :mixed
-          return [*'A'..'Z', *'a'..'z']
+          [*'A'..'Z', *'a'..'z']
         elsif casing == :upper
-          return [*'A'..'Z']
+          [*'A'..'Z']
         elsif casing == :lower
-          return [*'a'..'z']
+          [*'a'..'z']
         end
       end
 
@@ -66,7 +66,7 @@ def self.rand_email
       # Generate a random month name.
       # @return [String] the month name.
       def self.rand_month
-        %w(january february march april june july august september october november december).sample
+        %w[january february march april june july august september october november december].sample
       end
     end
   end