trac-admin: fix glitch in `wiki list` command (follow-up to r10183)
trac-admin: fix glitch in `wiki list` command (follow-up to r10183)

git-svn-id: f68c6b3b1dcd5d00a2560c384475aaef3bc99487@10441 af82e41b-90c4-0310-8c96-b1721e28e2e2

dafrito/trac-mirror,dafrito/trac-mirror,dafrito/trac-mirror,dafrito/trac-mirror