igraph 2.1.3

Features

• Use _pv destroy functions to satisfy ASAN checks (#1630).

• Use safe accessor to vector elements (#1633).

Chore

• Replace graph.isomorphic() with isomorphic() (#1583, #1623).

Documentation

• Convert plot.common.Rd to roxygen2 (#1424, #1636).

• Remove broken example from graph_from_graphdb() manual page (#1622, #1637).

• Document argument for NCOL format in read_graph() (#1621).

• Make documentation of disjoint_union() consistent with behavior (#1587, #1641).

• Add central note about experimental functions (#1624).