[ruby-core:81559] [Ruby trunk Feature#13630] :[] method should accept block in nice syntax

Issue #13630 has been reported by khoan (khoa nguyen).

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Feature #13630: :[] method should accept block in nice syntax
https://bugs.ruby-lang.org/issues/13630

* Author: khoan (khoa nguyen)
* Status: Open
* Priority: Normal
* Assignee: 
* Target version: 
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~~~ ruby
# given
module Bam
  def self.[](bam)
    yield bam
  end
end

# SyntaxError: unexpected keyword_do_block
Bam['bam'] do |b|
  puts b
end

# SyntaxError: unexpected { arg, expecting end-of-input
Bam['bam'] { |b|
  puts b
}

# Valid but more verbose
Bam.[]('bam') do |b|
  puts b
end

Bam.[]('bam') { |b|
  puts b
}
~~~



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