Appraise parenthesis during completion

[kaiquekandykoga]

Hello guys,

This is an attempt to fix the issue #299.

When absolute constant is used with ) an exception is raised with regex during completion.

It includes ) character verification to prevent raising an exception.

After

3.0.2 :001 > defined?(::A)
 => nil

Before

3.0.2 :001 > defined?(::A)
/irb/lib/irb/completion.rb:207:in `retrieve_completion_data': unmatched close parenthesis: /^A)/ (RegexpError)

Thank you very much.

[aycabta]

Good catch, thank you!