markov plugin: use symbol when deleting obsolete config key

diff --git a/data/rbot/plugins/markov.rb b/data/rbot/plugins/markov.rb
index 51fa212f61ba69e58fed1eb12be028b7763f0d5d..bae70263b3d66d98e9ecaf30a32f2f32f5a90243 100644 (file)
--- a/data/rbot/plugins/markov.rb
+++ b/data/rbot/plugins/markov.rb
@@ -35,7 +35,7 @@ class MarkovPlugin < Plugin
     if @bot.config['markov.ignore_users']
       debug "moving markov.ignore_users to markov.ignore"
       @bot.config['markov.ignore'] = @bot.config['markov.ignore_users'].dup
-      @bot.config.delete('markov.ignore_users')
+      @bot.config.delete('markov.ignore_users'.to_sym)
     end
     @learning_queue = Queue.new
     @learning_thread = Thread.new do