scrapy/scrapy — pull request #661 by ananana (2014-03-20 01:33:49+00:00)
Title: Fixed default value of attrs argument in SgmlLinkExtractor to be tuple

- Fixed bug in issue #652 (default value of `attrs` is now tuple)
- Wrapped `tags` and `attrs` in `arg_to_iter()`, so `tag_func` and `attr_func` would accept both strings and lists. (so this version of the constructor is compatible with the old one)