Pajek export and spaces

[Gábor Csárdi]

Riccrdo Tasso's report:

   I have the following pajek file, wich I import in R with the usual g <- read.graph(filename, 'pajek'):

*vertices 3
1 98 "a"
2 11 "b"
3 38 "c d"
*arcs
1 2 3
2 1 1
3 1 8

Each node has a numeric attribute and a string attribute.
When I serialize my network with graph.write(g, filename, 'pajek'), I obtain a strange text file:

*Vertices 3
1 "98" a
2 "11" b
3 "38" c d
*Arcs
1 2 3
2 1 1
3 1 8

The problem is that without quotes strings with spaces give a parse error reading back the last pajek written:

Error in read.graph.pajek(file, ...) :
 At foreign.c:574 : Parse error in Pajek file, line 3 (syntax error), Parse error

[Tamás Nepusz (ntamas)]

FIxed in #2705 in trunk.

[Gábor Csárdi (gabor.csardi)]

The development of igraph has moved to github, so please do not comment on this bug here. You are of course welcome to comment on github, here:
https://github.com/igraph/igraph/issues/73