(core - fix docstring typo)

Ignore-this: da6ef998ab74e2337797cbfb30c05dca

darcs-hash:20140111122141-3a4db-09b4dcc728702f7973931c5e1f87f3ea8647aafb
update copyrights for 2014

Ignore-this: b2b3568c44bbb82db425363b84a1704a

darcs-hash:20140207172544-3a4db-700e58eb8968596bfe281dadf99a8608a82f2ee7