Corrected a bug in the nodes method for directed-edge-class.

Author Pascal J. Bourguignon <pjb@informatimago.com>
Author date 2015-07-16 05:16:43
Author local date 2015-07-16 07:16:43 +0200
Committer Pascal J. Bourguignon <pjb@informatimago.com>
Committer date 2015-07-16 05:16:43
Committer local date 2015-07-16 07:16:43 +0200
Commit 0bdfcead592fc0cc2cd4e73dec1dede7fdaadc85
Tree d8ccb312550e689564a8f23c89527318bbc21bd6
Parent 061ba5911b1a5d2c1bbbd774a7d0898c4dbe0917
Corrected a bug in the nodes method for directed-edge-class.
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