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`a += b` is syntax sugar of `a = a + b`; it creates a new string object. `a << b` is concatenation and doesn't create new object. git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@36530 b2dd03c8-39d4-4d8f-98ff-823fe69b080e |
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session.rb | ||
util.rb |