apply case-in-assignment pattern

activemodel/lib/active_model/type/helpers/numeric.rb

@@ -3,12 +3,13 @@ module Type
     module Helpers
       module Numeric # :nodoc:
         def cast(value)
-          value = case value
-                  when true then 1
-                  when false then 0
-                  when ::String then value.presence
-                  else value
-          end
+          value = \
+            case value
+            when true then 1
+            when false then 0
+            when ::String then value.presence
+            else value
+            end
           super(value)
         end
 

activemodel/lib/active_model/type/immutable_string.rb

@@ -17,11 +17,12 @@ def serialize(value)
       private
 
         def cast_value(value)
-          result = case value
-                   when true then "t"
-                   when false then "f"
-                   else value.to_s
-          end
+          result = \
+            case value
+            when true then "t"
+            when false then "f"
+            else value.to_s
+            end
           result.freeze
         end
     end