[ruby/optparse] Remove extra blank lines [ci skip]

https://github.com/ruby/optparse/commit/d7dec6808f

lib/optparse.rb

@@ -496,7 +496,6 @@ class OptionParser
     end
   end
 
-
   #
   # Map from option/keyword string to object with completion.
   #
@@ -504,7 +503,6 @@ class OptionParser
     include Completion
   end
 
-
   #
   # Individual switch class.  Not important to the user.
   #
@@ -1032,7 +1030,6 @@ class OptionParser
   DefaultList.short['-'] = Switch::NoArgument.new {}
   DefaultList.long[''] = Switch::NoArgument.new {throw :terminate}
 
-
   COMPSYS_HEADER = <<'XXX'      # :nodoc:
 
 typeset -A opt_args