title: ambiguous option: --o (OptionParser::AmbiguousOption) error received when running Selenium, ruby script
body: <p>I am trying to run the project which is built using Watir, Ruby and Cucumber which was previously working on different version of software/system details. </p>
  
  <p>Current System details which is facing issue :</p>
  
  <pre><code>Windows 8
  Cucumber version : 2.0.0
  gem version : 2.4.6
  Ruby version: ruby 2.2.1p85 (2015-02-26 revision 49769) [x64-mingw32]
  </code></pre>
  
  <p>the pack was working on below configuration:</p>
  
  <pre><code>Windows XP/7
  Cucumber 1.3.17
  Gem : 2.0.14
  Ruby: 2.0.0p481
  </code></pre>
  
  <p><strong>When I run my script using rake command, I get below mentioned error:</strong> </p>
  
  <pre><code>ambiguous option: --o (OptionParser::AmbiguousOption)
  C:/Automation/SeleniumAutomationUsingRuby/Ruby221/lib/ruby/gems/2.2.0/gems/cucum
  ber-2.0.0/lib/cucumber/cli/options.rb:253:in `parse!'
  C:/Automation/SeleniumAutomationUsingRuby/Ruby221/lib/ruby/gems/2.2.0/gems/cucum
  ber-2.0.0/lib/cucumber/cli/configuration.rb:25:in `parse!'
  C:/Automation/SeleniumAutomationUsingRuby/Ruby221/lib/ruby/gems/2.2.0/gems/cucum
  ber-2.0.0/lib/cucumber/cli/main.rb:64:in `block in configuration'
  C:/Automation/SeleniumAutomationUsingRuby/Ruby221/lib/ruby/gems/2.2.0/gems/cucum
  ber-2.0.0/lib/cucumber/cli/main.rb:63:in `tap'
  C:/Automation/SeleniumAutomationUsingRuby/Ruby221/lib/ruby/gems/2.2.0/gems/cucum
  ber-2.0.0/lib/cucumber/cli/main.rb:63:in `configuration'
  C:/Automation/SeleniumAutomationUsingRuby/Ruby221/lib/ruby/gems/2.2.0/gems/cucum
  ber-2.0.0/lib/cucumber/cli/main.rb:35:in `execute!'
  C:/Automation/SeleniumAutomationUsingRuby/Ruby221/lib/ruby/gems/2.2.0/gems/cucum
  ber-2.0.0/bin/cucumber:9:in `&lt;top (required)&gt;'
  C:/Automation/SeleniumAutomationUsingRuby/Ruby221/bin/cucumber:23:in `load'
  C:/Automation/SeleniumAutomationUsingRuby/Ruby221/bin/cucumber:23:in `&lt;main&gt;'
  </code></pre>
  
  <p>I tried searching for some answers to this, but looks like no one faced this before. So could you please help me in trying to identifying what has gone wrong</p>