issue_closing_pattern value mismatch in documentation and code

Created by: hgj

The documentation in the configuration reads: "When not specified the default issue_closing_pattern as specified below will be used."

But the line does not match the line that is in the source code (as the real default value):

• Documentation: '([Cc]lose[sd]|[Ff]ixe[sd]) +#\d+'
• Source code: '([Cc]loses|[Ff]ixes) #(\d+)'

It missed our "fixed" words, so I went after the problem. Sorry for providing no patch. The line is in config/initializers/1_settings.rb