test-ssh: stop quoting dummyssh invocation for Windows
The other invocations aren't quoted, and Windows doesn't like the single quotes:
diff --git a/tests/test-ssh.t b/tests/test-ssh.t
--- a/tests/test-ssh.t
+++ b/tests/test-ssh.t
@@ -520,20 +520,8 @@ remote hook failure is attributed to rem
$ echo "pretxnchangegroup.fail = python:$TESTTMP/failhook:hook" >> remote/.hg/hgrc
$ hg -q --config ui.ssh="python '$TESTDIR/dummyssh'" clone ssh://user@dummy/remote hookout
+ abort: no suitable response from remote hg!
+ [255]
$ cd hookout
+ $TESTTMP.sh: line 264: cd: hookout: No such file or directory
$ touch hookfailure
- $ hg -q commit -A -m 'remote hook failure'
....