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Ruby warns "instance variable `@version` not initialized" for optparse when it receives `--version` option.
`test.rb`
```ruby
require 'optparse'
Version = '1'
OptionParser.new.parse(ARGV)
```
```
$ ruby -w test.rb --version
/home/pocke/.rbenv/versions/2.5.1/lib/ruby/2.5.0/optparse.rb:1168: warning: instance variable @version not initialized
/home/pocke/.rbenv/versions/2.5.1/lib/ruby/2.5.0/optparse.rb:1175: warning: instance variable @release not initialized
test 1
```
This change will suppress the warnings.
[Fix GH-1871]
From: Masataka Pocke Kuwabara <kuwabara@pocke.me>
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@63342 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
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git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@62047 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
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When you change this to true, you may need to add more tests.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@53141 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
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test for r35467. OptionParser#to_a shouldn't split banner by spaces.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@35473 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
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[ruby-dev:45568][Bug #6348]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@35467 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
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[ruby-dev:45568][Bug #6348]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@35455 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
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defined. [ruby-dev:45568][Bug #6348]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@35453 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
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solely.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@28387 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
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to latter switches. [ruby-dev:36692]
* lib/optparse.rb (OptionParser#summarize): do not append
unnecessary line terminator.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@21066 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
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