Add IRB config, update console script

The `.irbrc` file configures IRB in a couple of ways, most notably by
dropping a local `.irb_history` file (ignored by Git) that'll persist
across `bin/console` sessions. Useful!

.gitignore

@@ -13,6 +13,10 @@
 # Used by dotenv library to load environment variables.
 # .env
 
+# Ignore history files.
+.irb_history
+.rdbg_history
+
 # Documentation cache and generated files:
 /.yardoc/
 /_yardoc/
@@ -32,3 +36,6 @@ Gemfile.lock
 
 # unless supporting rvm < 1.11.0 or doing something fancy, ignore this:
 .rvmrc
+
+# Used by RuboCop. Remote config files pulled in from inherit_from directive.
+# .rubocop-https?--*

.irbrc

@@ -0,0 +1,12 @@
+# frozen_string_literal: true
+
+require "irb/completion"
+
+IRB.conf[:AUTO_INDENT] = true
+IRB.conf[:HISTORY_FILE] = ".irb_history"
+IRB.conf[:SAVE_HISTORY] = 1000
+IRB.conf[:USE_AUTOCOMPLETE] = false
+
+def clear
+  system("clear")
+end

bin/console

@@ -1,15 +1,15 @@
 #!/usr/bin/env ruby
 # frozen_string_literal: true
 
-require 'bundler/setup'
-require 'indieweb/endpoints'
+require "bundler/setup"
+require "indieweb/endpoints"
 
 # You can add fixtures and/or initialization code here to make experimenting
 # with your gem easier. You can also use a different console, if you like.
 
-# (If you use this, don't forget to add pry to your Gemfile!)
-# require 'pry'
+# (If you use this, don"t forget to add pry to your Gemfile!)
+# require "pry"
 # Pry.start
 
-require 'irb'
+require "irb"
 IRB.start(__FILE__)