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-rw-r--r--lib/irb/ruby-lex.rb9
1 files 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