Incorrect use of || breaks helpers in Ruby 1.9

The problem with the following line ought to be obvious: '@staticmatic', being truthy, will always be the result of the disjunction.

@scope.instance_variable_set(var, nil) unless var == ('@staticmatic' || :@staticmatic)

This is a problem on Ruby 1.9, where instance variables names are always set to symbols, even if strings are used in the setters (as they are in Staticmatic). Consider this example script:

obj = Object.new
obj.instance_variable_set("@myvar", "Test.")
obj.instance_variables.each do |var|
  puts var.class
end

Ruby 1.8.x will print String; Ruby 1.9.x will print Symbol.

Patch is attached.