Add some messaging when the encrypted contents don't change

And update the spec tests for the latest changes

lib/gitlab/encrypted_ldap_command.rb

@@ -22,23 +22,26 @@ module Gitlab
         encrypted = Gitlab::Auth::Ldap::Config.encrypted_secrets
         return unless validate_config(encrypted)
 
-        if ENV["EDITOR"].to_s.empty?
+        if ENV["EDITOR"].blank?
           puts 'No $EDITOR specified to open file. Please provide one when running the command:'
           puts 'gitlab-rake gitlab:ldap:secret:edit EDITOR=vim'
           return
         end
 
         temp_file = Tempfile.new(File.basename(encrypted.content_path), File.dirname(encrypted.content_path))
+        contents_changed = false
 
         encrypted.change do |contents|
           contents = encrypted_file_template unless File.exist?(encrypted.content_path)
           File.write(temp_file.path, contents)
           system(ENV['EDITOR'], temp_file.path)
           changes = File.read(temp_file.path)
+          contents_changed = contents != changes
           validate_contents(changes)
           changes
         end
 
+        puts "Contents were unchanged." unless contents_changed
         puts "File encrypted and saved."
       rescue Interrupt
         puts "Aborted changing file: nothing saved."

spec/tasks/gitlab/ldap_rake_spec.rb

@@ -32,7 +32,7 @@ RSpec.describe 'gitlab:ldap:secret rake tasks' do
 
   describe ':show' do
     it 'displays error when file does not exist' do
-      expect { run_rake_task('gitlab:ldap:secret:show') }.to output(/File .* does not exist. Use `rake gitlab:ldap:secret:edit` to change that./).to_stdout
+      expect { run_rake_task('gitlab:ldap:secret:show') }.to output(/File .* does not exist. Use `gitlab-rake gitlab:ldap:secret:edit` to change that./).to_stdout
     end
 
     it 'displays error when key does not exist' do