From ec7e082906d5c32c5e895137fd0d562fa237ca12 Mon Sep 17 00:00:00 2001
From: Mau Magnaguagno <maumagnaguagno@gmail.com>
Date: Tue, 27 Dec 2022 14:05:28 -0300
Subject: [PATCH] [ruby/irb] Refactor RubyLex#process_literal_type
 (https://github.com/ruby/irb/pull/350)

Simplify part of regex ``[_a-zA-Z0-9]`` with equivalent shorthand ``\w``.
Replace case-when with match ``$1`` or default value ``?"``, making intention more clear.
---
 lib/irb/ruby-lex.rb | 9 ++-------
 1 file changed, 2 insertions(+), 7 deletions(-)

diff --git a/lib/irb/ruby-lex.rb b/lib/irb/ruby-lex.rb
index 030cf79ee1..04d9bceb07 100644
--- a/lib/irb/ruby-lex.rb
+++ b/lib/irb/ruby-lex.rb
@@ -782,13 +782,8 @@ class RubyLex
     when :on_qsymbols_beg then ?]
     when :on_symbols_beg  then ?]
     when :on_heredoc_beg
-      start_token&.tok =~ /<<[-~]?(['"`])[_a-zA-Z0-9]+\1/
-      case $1
-      when ?" then ?"
-      when ?' then ?'
-      when ?` then ?`
-      else         ?"
-      end
+      start_token&.tok =~ /<<[-~]?(['"`])\w+\1/
+      $1 || ?"
     else
       nil
     end