tests: stabilize ssh tests on Windows

This seems like a somewhat common type of failure (double vs single quote), so
I'm interested in ideas about how to avoid this.  I doubt that we should
automatically fall back from single quote to double quote, like with '/' vs '\'.

tests/test-debugcommands.t

@@ -390,7 +390,8 b' Test debugpeer'
   pushable: yes
 
   $ hg --config ui.ssh="\"$PYTHON\" \"$TESTDIR/dummyssh\"" --debug debugpeer ssh://user@dummy/debugrevlog
-  running "*" "*/tests/dummyssh" 'user@dummy' 'hg -R debugrevlog serve --stdio' (glob)
+  running "*" "*/tests/dummyssh" 'user@dummy' 'hg -R debugrevlog serve --stdio' (glob) (no-windows !)
+  running "*" "*\tests/dummyssh" "user@dummy" "hg -R debugrevlog serve --stdio" (glob) (windows !)
   devel-peer-request: hello
   sending hello command
   devel-peer-request: between

tests/test-ssh-proto.t

@@ -17,7 +17,8 b''
 Test a normal behaving server, for sanity
 
   $ hg --debug debugpeer ssh://user@dummy/server
-  running * "*/tests/dummyssh" 'user@dummy' 'hg -R server serve --stdio' (glob)
+  running * "*/tests/dummyssh" 'user@dummy' 'hg -R server serve --stdio' (glob) (no-windows !)
+  running * "*\tests/dummyssh" "user@dummy" "hg -R server serve --stdio" (glob) (windows !)
   devel-peer-request: hello
   sending hello command
   devel-peer-request: between
@@ -63,7 +64,8 b' SSH banner is not printed by default, ig'
 --debug will print the banner
 
   $ SSHSERVERMODE=banner hg --debug debugpeer ssh://user@dummy/server
-  running * "*/tests/dummyssh" 'user@dummy' 'hg -R server serve --stdio' (glob)
+  running * "*/tests/dummyssh" 'user@dummy' 'hg -R server serve --stdio' (glob) (no-windows !)
+  running * "*\tests/dummyssh" "user@dummy" "hg -R server serve --stdio" (glob) (windows !)
   devel-peer-request: hello
   sending hello command
   devel-peer-request: between
@@ -114,7 +116,8 b' The client should refuse, as we dropped '
 servers.
 
   $ SSHSERVERMODE=no-hello hg --debug debugpeer ssh://user@dummy/server
-  running * "*/tests/dummyssh" 'user@dummy' 'hg -R server serve --stdio' (glob)
+  running * "*/tests/dummyssh" 'user@dummy' 'hg -R server serve --stdio' (glob) (no-windows !)
+  running * "*\tests/dummyssh" "user@dummy" "hg -R server serve --stdio" (glob) (windows !)
   devel-peer-request: hello
   sending hello command
   devel-peer-request: between
@@ -141,7 +144,8 b' Sending an unknown command to the server'
   
 
   $ hg --config sshpeer.mode=extra-handshake-commands --config sshpeer.handshake-mode=pre-no-args --debug debugpeer ssh://user@dummy/server
-  running * "*/tests/dummyssh" 'user@dummy' 'hg -R server serve --stdio' (glob)
+  running * "*/tests/dummyssh" 'user@dummy' 'hg -R server serve --stdio' (glob) (no-windows !)
+  running * "*\tests/dummyssh" "user@dummy" "hg -R server serve --stdio" (glob) (windows !)
   sending no-args command
   devel-peer-request: hello
   sending hello command
@@ -176,7 +180,8 b' Send multiple unknown commands before he'
   
 
   $ hg --config sshpeer.mode=extra-handshake-commands --config sshpeer.handshake-mode=pre-multiple-no-args --debug debugpeer ssh://user@dummy/server
-  running * "*/tests/dummyssh" 'user@dummy' 'hg -R server serve --stdio' (glob)
+  running * "*/tests/dummyssh" 'user@dummy' 'hg -R server serve --stdio' (glob) (no-windows !)
+  running * "*\tests/dummyssh" "user@dummy" "hg -R server serve --stdio" (glob) (windows !)
   sending unknown1 command
   sending unknown2 command
   sending unknown3 command
@@ -405,7 +410,8 b' Send an upgrade request to a server that'
   
 
   $ hg --config experimental.sshpeer.advertise-v2=true --debug debugpeer ssh://user@dummy/server
-  running * "*/tests/dummyssh" 'user@dummy' 'hg -R server serve --stdio' (glob)
+  running * "*/tests/dummyssh" 'user@dummy' 'hg -R server serve --stdio' (glob) (no-windows !)
+  running * "*\tests/dummyssh" "user@dummy" "hg -R server serve --stdio" (glob) (windows !)
   sending upgrade request: * proto=exp-ssh-v2-0001 (glob)
   devel-peer-request: hello
   sending hello command
@@ -434,7 +440,8 b' Send an upgrade request to a server that'
   capabilities: lookup changegroupsubset branchmap pushkey known getbundle unbundlehash batch streamreqs=generaldelta,revlogv1 $USUAL_BUNDLE2_CAPS_SERVER$ unbundle=HG10GZ,HG10BZ,HG10UN
 
   $ SSHSERVERMODE=upgradev2 hg --config experimental.sshpeer.advertise-v2=true --debug debugpeer ssh://user@dummy/server
-  running * "*/tests/dummyssh" 'user@dummy' 'hg -R server serve --stdio' (glob)
+  running * "*/tests/dummyssh" 'user@dummy' 'hg -R server serve --stdio' (glob) (no-windows !)
+  running * "*\tests/dummyssh" "user@dummy" "hg -R server serve --stdio" (glob) (windows !)
   sending upgrade request: * proto=exp-ssh-v2-0001 (glob)
   devel-peer-request: hello
   sending hello command
@@ -449,7 +456,8 b' Send an upgrade request to a server that'
 Verify the peer has capabilities
 
   $ SSHSERVERMODE=upgradev2 hg --config experimental.sshpeer.advertise-v2=true --debug debugcapabilities ssh://user@dummy/server
-  running * "*/tests/dummyssh" 'user@dummy' 'hg -R server serve --stdio' (glob)
+  running * "*/tests/dummyssh" 'user@dummy' 'hg -R server serve --stdio' (glob) (no-windows !)
+  running * "*\tests/dummyssh" "user@dummy" "hg -R server serve --stdio" (glob) (windows !)
   sending upgrade request: * proto=exp-ssh-v2-0001 (glob)
   devel-peer-request: hello
   sending hello command