Rename leftover Reidline references

Author: st0012

lib/irb/ext/save-history.rb

@@ -73,7 +73,7 @@ def load_history
         open(history_file, "r:#{IRB.conf[:LC_MESSAGES].encoding}") do |f|
           f.each { |l|
             l = l.chomp
-            if self.class == ReidlineInputMethod and history.last&.end_with?("\\")
+            if self.class == RelineInputMethod and history.last&.end_with?("\\")
               history.last.delete_suffix!("\\")
               history.last << "\n" << l
             else

lib/irb/input-method.rb

@@ -461,7 +461,7 @@ def encoding
     # For debug message
     def inspect
       config = Reline::Config.new
-      str = "ReidlineInputMethod with Reline #{Reline::VERSION}"
+      str = "RelineInputMethod with Reline #{Reline::VERSION}"
       if config.respond_to?(:inputrc_path)
         inputrc_path = File.expand_path(config.inputrc_path)
       else