Bugfix: properly update edited snippets, rather than duplicating them

Author: trinitytakei

app/models/ingredient.rb

@@ -135,10 +135,7 @@ def ui_relevant_attributes_changed?
   def process_snippets
     return if new_snippets.blank?
 
-    self.snippets ||= []
-    filtered_snippets = new_snippets.reject(&:blank?)
-
-    self.snippets += filtered_snippets.reject { |s| snippets.include?(s) }
+    self.snippets = new_snippets.compact_blank
   end
 
   def to_literal(snippet, index)

test/controllers/ingredients_controller_test.rb

@@ -163,7 +163,7 @@ def teardown
     patch ingredient_url(@ingredient), params: {
       ingredient: {
         template_content: @ingredient.template_content,
-        new_snippets: [ "additional snippet" ]
+        new_snippets: [ "existing snippet", "additional snippet" ]
       }
     }