Adding updated and fixed files issue alaashafaee#211

tutor/app/controllers/hints_controller.rb

@@ -0,0 +1,20 @@
+class HintsController < ApplicationController
+
+	@@answer_id = nil
+
+	# [Delete a Hint - Story 4.21]
+	# This action takes the hint id, removes it from the database
+	# and then redirects the user to the edit page accompanied
+	# with a "Hint deleted" message.
+	# Parameters:
+	#	params[:id]: The current hint's id
+	# Returns: 
+	#	none
+	# Author: Mohamed Fadel
+	def destroy
+		hint = Hint.find_by_id(params[:id])
+		hint.destroy
+		flash[:success_deletion] = "Hint deleted."
+		redirect_to :controller => 'model_answers', :action => 'edit', :id => @@answer_id
+	end
+end

tutor/app/views/model_answers/_index.html.erb

@@ -0,0 +1,7 @@
+<!--Add delete button to the edit view in model answers
+Author: Mohamed Fadel-->
+
+<th style = "width:20%">Delete</th>
+
+<td><%= button_to "Delete", {controller: :hints, action: :destroy, id: hint1.id}, 
+								:method => :delete, class: 'btn btn-primary btn-xs' %></td>