# File activesupport/lib/active_support/core_ext/hash/keys.rb, line 14
def stringify_keys!
keys.each do |key|
unless key.class.to_s == "String" # weird hack to make the tests run when string_ext_test.rb is also running
self[key.to_s] = self[key]
delete(key)
end
end
self
end