networkx/networkx — pull request #1149 by frncsrss (2014-05-10 09:51:59+00:00)
Title: Speed up k-corona computation.

* Only nodes from the k-shell can be in the k-corona (no need to consider all the nodes in the k-core).
* Also fix the pydoc (s/subset/subgraph/ and s/vertices/nodes/ for consistency).