tests: quote $PYTHON for Windows

tests: quote $PYTHON for Windows

When unquoted, MSYS sees the colon between the drive letter and path as a Unix
path separator and unhelpfully splits on it, feeding only the drive letter as
the command.  Much chaos ensues.

I vaguely remember trying to get the test runner to use /letter/path/to/exe
syntax the last time this happened, without success.  I doubt a check-code rule
would work, since sometimes it is quoted, and sometimes the quotes are escaped.

--- a/tests/test-bundle2-exchange.t	Mon Jun 26 15:28:28 2017 -0700
+++ b/tests/test-bundle2-exchange.t	Fri Jul 07 01:05:20 2017 -0400
@@ -18,7 +18,7 @@
   > evolution=createmarkers,exchange
   > bundle2-output-capture=True
   > [ui]
-  > ssh=$PYTHON "$TESTDIR/dummyssh"
+  > ssh="$PYTHON" "$TESTDIR/dummyssh"
   > logtemplate={rev}:{node|short} {phase} {author} {bookmarks} {desc|firstline}
   > [web]
   > push_ssl = false
@@ -909,7 +909,7 @@
   $ cp $TESTTMP/hgrc.orig $HGRCPATH
   $ cat >> $HGRCPATH <<EOF
   > [ui]
-  > ssh=$PYTHON "$TESTDIR/dummyssh"
+  > ssh="$PYTHON" "$TESTDIR/dummyssh"
   > EOF
 
   $ cat >> $TESTTMP/locktester.py <<EOF

--- a/tests/test-clone.t	Mon Jun 26 15:28:28 2017 -0700
+++ b/tests/test-clone.t	Fri Jul 07 01:05:20 2017 -0400
@@ -1044,7 +1044,7 @@
   $ hg id -R remote -r 0
   abort: repository remote not found!
   [255]
-  $ hg --config share.pool=share -q clone -e "$PYTHON \"$TESTDIR/dummyssh\"" a ssh://user@dummy/remote
+  $ hg --config share.pool=share -q clone -e "\"$PYTHON\" \"$TESTDIR/dummyssh\"" a ssh://user@dummy/remote
   $ hg -R remote id -r 0
   acb14030fe0a
 

--- a/tests/test-clonebundles.t	Mon Jun 26 15:28:28 2017 -0700
+++ b/tests/test-clonebundles.t	Fri Jul 07 01:05:20 2017 -0400
@@ -69,7 +69,7 @@
 
 Server returns 404
 
-  $ $PYTHON $TESTDIR/dumbhttp.py -p $HGPORT1 --pid http.pid
+  $ "$PYTHON" $TESTDIR/dumbhttp.py -p $HGPORT1 --pid http.pid
   $ cat http.pid >> $DAEMON_PIDS
   $ hg clone http://localhost:$HGPORT running-404
   applying clone bundle from http://localhost:$HGPORT1/bundle.hg
@@ -197,7 +197,7 @@
 
 Feature works over SSH
 
-  $ hg clone -U -e "$PYTHON \"$TESTDIR/dummyssh\"" ssh://user@dummy/server ssh-full-clone
+  $ hg clone -U -e "\"$PYTHON\" \"$TESTDIR/dummyssh\"" ssh://user@dummy/server ssh-full-clone
   applying clone bundle from http://localhost:$HGPORT1/full.hg
   adding changesets
   adding manifests

--- a/tests/test-http-branchmap.t	Mon Jun 26 15:28:28 2017 -0700
+++ b/tests/test-http-branchmap.t	Fri Jul 07 01:05:20 2017 -0400
@@ -87,7 +87,7 @@
   > EOF
   $ echo baz >> b/foo
   $ hg -R b ci -m baz
-  $ hg push -R b -e '$PYTHON oldhg' ssh://dummy/ --encoding latin1
+  $ hg push -R b -e "\"$PYTHON\" oldhg" ssh://dummy/ --encoding latin1
   pushing to ssh://dummy/
   searching for changes
   remote: adding changesets

--- a/tests/test-init.t	Mon Jun 26 15:28:28 2017 -0700
+++ b/tests/test-init.t	Fri Jul 07 01:05:20 2017 -0400
@@ -106,7 +106,7 @@
 
 init+push to remote2
 
-  $ hg init -e "$PYTHON \"$TESTDIR/dummyssh\"" ssh://user@dummy/remote2
+  $ hg init -e "\"$PYTHON\" \"$TESTDIR/dummyssh\"" ssh://user@dummy/remote2
   $ hg incoming -R remote2 local
   comparing with local
   changeset:   0:08b9e9f63b32
@@ -116,7 +116,7 @@
   summary:     init
   
 
-  $ hg push -R local -e "$PYTHON \"$TESTDIR/dummyssh\"" ssh://user@dummy/remote2
+  $ hg push -R local -e "\"$PYTHON\" \"$TESTDIR/dummyssh\"" ssh://user@dummy/remote2
   pushing to ssh://user@dummy/remote2
   searching for changes
   remote: adding changesets
@@ -126,7 +126,7 @@
 
 clone to remote1
 
-  $ hg clone -e "$PYTHON \"$TESTDIR/dummyssh\"" local ssh://user@dummy/remote1
+  $ hg clone -e "\"$PYTHON\" \"$TESTDIR/dummyssh\"" local ssh://user@dummy/remote1
   searching for changes
   remote: adding changesets
   remote: adding manifests
@@ -134,7 +134,7 @@
   remote: added 1 changesets with 1 changes to 1 files
 
 The largefiles extension doesn't crash
-  $ hg clone -e "$PYTHON \"$TESTDIR/dummyssh\"" local ssh://user@dummy/remotelf --config extensions.largefiles=
+  $ hg clone -e "\"$PYTHON\" \"$TESTDIR/dummyssh\"" local ssh://user@dummy/remotelf --config extensions.largefiles=
   The fsmonitor extension is incompatible with the largefiles extension and has been disabled. (fsmonitor !)
   The fsmonitor extension is incompatible with the largefiles extension and has been disabled. (fsmonitor !)
   searching for changes
@@ -145,14 +145,14 @@
 
 init to existing repo
 
-  $ hg init -e "$PYTHON \"$TESTDIR/dummyssh\"" ssh://user@dummy/remote1
+  $ hg init -e "\"$PYTHON\" \"$TESTDIR/dummyssh\"" ssh://user@dummy/remote1
   abort: repository remote1 already exists!
   abort: could not create remote repo!
   [255]
 
 clone to existing repo
 
-  $ hg clone -e "$PYTHON \"$TESTDIR/dummyssh\"" local ssh://user@dummy/remote1
+  $ hg clone -e "\"$PYTHON\" \"$TESTDIR/dummyssh\"" local ssh://user@dummy/remote1
   abort: repository remote1 already exists!
   abort: could not create remote repo!
   [255]
@@ -251,7 +251,7 @@
   $ hg -R local bookmark test
   $ hg -R local bookmarks
    * test                      0:08b9e9f63b32
-  $ hg clone -e "$PYTHON \"$TESTDIR/dummyssh\"" local ssh://user@dummy/remote-bookmarks
+  $ hg clone -e "\"$PYTHON\" \"$TESTDIR/dummyssh\"" local ssh://user@dummy/remote-bookmarks
   searching for changes
   remote: adding changesets
   remote: adding manifests

--- a/tests/test-largefiles-wireproto.t	Mon Jun 26 15:28:28 2017 -0700
+++ b/tests/test-largefiles-wireproto.t	Fri Jul 07 01:05:20 2017 -0400
@@ -112,7 +112,7 @@
 #endif
 
 vanilla clients locked out from largefiles ssh repos
-  $ hg --config extensions.largefiles=! clone -e "$PYTHON \"$TESTDIR/dummyssh\"" ssh://user@dummy/r4 r5
+  $ hg --config extensions.largefiles=! clone -e "\"$PYTHON\" \"$TESTDIR/dummyssh\"" ssh://user@dummy/r4 r5
   remote: 
   remote: This repository uses the largefiles extension.
   remote: 

--- a/tests/test-ssh-bundle1.t	Mon Jun 26 15:28:28 2017 -0700
+++ b/tests/test-ssh-bundle1.t	Fri Jul 07 01:05:20 2017 -0400
@@ -44,21 +44,21 @@
 
 repo not found error
 
-  $ hg clone -e "$PYTHON \"$TESTDIR/dummyssh\"" ssh://user@dummy/nonexistent local
+  $ hg clone -e "\"$PYTHON\" \"$TESTDIR/dummyssh\"" ssh://user@dummy/nonexistent local
   remote: abort: repository nonexistent not found!
   abort: no suitable response from remote hg!
   [255]
 
 non-existent absolute path
 
-  $ hg clone -e "$PYTHON \"$TESTDIR/dummyssh\"" ssh://user@dummy//`pwd`/nonexistent local
+  $ hg clone -e "\"$PYTHON\" \"$TESTDIR/dummyssh\"" ssh://user@dummy//`pwd`/nonexistent local
   remote: abort: repository /$TESTTMP/nonexistent not found!
   abort: no suitable response from remote hg!
   [255]
 
 clone remote via stream
 
-  $ hg clone -e "$PYTHON \"$TESTDIR/dummyssh\"" --uncompressed ssh://user@dummy/remote local-stream
+  $ hg clone -e "\"$PYTHON\" \"$TESTDIR/dummyssh\"" --uncompressed ssh://user@dummy/remote local-stream
   streaming all changes
   4 files to transfer, 602 bytes of data
   transferred 602 bytes in * seconds (*) (glob)
@@ -80,7 +80,7 @@
 clone bookmarks via stream
 
   $ hg -R local-stream book mybook
-  $ hg clone -e "$PYTHON \"$TESTDIR/dummyssh\"" --uncompressed ssh://user@dummy/local-stream stream2
+  $ hg clone -e "\"$PYTHON\" \"$TESTDIR/dummyssh\"" --uncompressed ssh://user@dummy/local-stream stream2
   streaming all changes
   4 files to transfer, 602 bytes of data
   transferred 602 bytes in * seconds (*) (glob)
@@ -96,7 +96,7 @@
 
 clone remote via pull
 
-  $ hg clone -e "$PYTHON \"$TESTDIR/dummyssh\"" ssh://user@dummy/remote local
+  $ hg clone -e "\"$PYTHON\" \"$TESTDIR/dummyssh\"" ssh://user@dummy/remote local
   requesting all changes
   adding changesets
   adding manifests
@@ -123,14 +123,14 @@
 
   $ hg paths
   default = ssh://user@dummy/remote
-  $ hg pull -e "$PYTHON \"$TESTDIR/dummyssh\""
+  $ hg pull -e "\"$PYTHON\" \"$TESTDIR/dummyssh\""
   pulling from ssh://user@dummy/remote
   searching for changes
   no changes found
 
 pull from wrong ssh URL
 
-  $ hg pull -e "$PYTHON \"$TESTDIR/dummyssh\"" ssh://user@dummy/doesnotexist
+  $ hg pull -e "\"$PYTHON\" \"$TESTDIR/dummyssh\"" ssh://user@dummy/doesnotexist
   pulling from ssh://user@dummy/doesnotexist
   remote: abort: repository doesnotexist not found!
   abort: no suitable response from remote hg!
@@ -145,7 +145,7 @@
 
   $ echo "default-push = ssh://user@dummy/remote" >> .hg/hgrc
   $ echo "[ui]" >> .hg/hgrc
-  $ echo "ssh = $PYTHON \"$TESTDIR/dummyssh\"" >> .hg/hgrc
+  $ echo "ssh = \"$PYTHON\" \"$TESTDIR/dummyssh\"" >> .hg/hgrc
 
 find outgoing
 
@@ -162,7 +162,7 @@
 
 find incoming on the remote side
 
-  $ hg incoming -R ../remote -e "$PYTHON \"$TESTDIR/dummyssh\"" ssh://user@dummy/local
+  $ hg incoming -R ../remote -e "\"$PYTHON\" \"$TESTDIR/dummyssh\"" ssh://user@dummy/local
   comparing with ssh://user@dummy/local
   searching for changes
   changeset:   3:a28a9d1a809c
@@ -175,7 +175,7 @@
 
 find incoming on the remote side (using absolute path)
 
-  $ hg incoming -R ../remote -e "$PYTHON \"$TESTDIR/dummyssh\"" "ssh://user@dummy/`pwd`"
+  $ hg incoming -R ../remote -e "\"$PYTHON\" \"$TESTDIR/dummyssh\"" "ssh://user@dummy/`pwd`"
   comparing with ssh://user@dummy/$TESTTMP/local
   searching for changes
   changeset:   3:a28a9d1a809c
@@ -222,7 +222,7 @@
 test pushkeys and bookmarks
 
   $ cd ../local
-  $ hg debugpushkey --config ui.ssh="$PYTHON \"$TESTDIR/dummyssh\"" ssh://user@dummy/remote namespaces
+  $ hg debugpushkey --config ui.ssh="\"$PYTHON\" \"$TESTDIR/dummyssh\"" ssh://user@dummy/remote namespaces
   bookmarks	
   namespaces	
   phases	
@@ -237,7 +237,7 @@
   no changes found
   exporting bookmark foo
   [1]
-  $ hg debugpushkey --config ui.ssh="$PYTHON \"$TESTDIR/dummyssh\"" ssh://user@dummy/remote bookmarks
+  $ hg debugpushkey --config ui.ssh="\"$PYTHON\" \"$TESTDIR/dummyssh\"" ssh://user@dummy/remote bookmarks
   foo	1160648e36cec0054048a7edc4110c6f84fde594
   $ hg book -f foo
   $ hg push --traceback
@@ -272,7 +272,7 @@
   > EOF
 
   $ echo '[hooks]' >> ../remote/.hg/hgrc
-  $ echo "changegroup.stdout = $PYTHON $TESTTMP/badhook" >> ../remote/.hg/hgrc
+  $ echo "changegroup.stdout = \"$PYTHON\" $TESTTMP/badhook" >> ../remote/.hg/hgrc
   $ echo r > r
   $ hg ci -A -m z r
 
@@ -307,7 +307,7 @@
   $ hg -R ../remote bookmark test
   $ hg -R ../remote bookmarks
    * test                      4:6c0482d977a3
-  $ hg clone -e "$PYTHON \"$TESTDIR/dummyssh\"" ssh://user@dummy/remote local-bookmarks
+  $ hg clone -e "\"$PYTHON\" \"$TESTDIR/dummyssh\"" ssh://user@dummy/remote local-bookmarks
   requesting all changes
   adding changesets
   adding manifests
@@ -334,21 +334,21 @@
 
 Test remote paths with spaces (issue2983):
 
-  $ hg init --ssh "$PYTHON \"$TESTDIR/dummyssh\"" "ssh://user@dummy/a repo"
+  $ hg init --ssh "\"$PYTHON\" \"$TESTDIR/dummyssh\"" "ssh://user@dummy/a repo"
   $ touch "$TESTTMP/a repo/test"
   $ hg -R 'a repo' commit -A -m "test"
   adding test
   $ hg -R 'a repo' tag tag
-  $ hg id --ssh "$PYTHON \"$TESTDIR/dummyssh\"" "ssh://user@dummy/a repo"
+  $ hg id --ssh "\"$PYTHON\" \"$TESTDIR/dummyssh\"" "ssh://user@dummy/a repo"
   73649e48688a
 
-  $ hg id --ssh "$PYTHON \"$TESTDIR/dummyssh\"" "ssh://user@dummy/a repo#noNoNO"
+  $ hg id --ssh "\"$PYTHON\" \"$TESTDIR/dummyssh\"" "ssh://user@dummy/a repo#noNoNO"
   abort: unknown revision 'noNoNO'!
   [255]
 
 Test (non-)escaping of remote paths with spaces when cloning (issue3145):
 
-  $ hg clone --ssh "$PYTHON \"$TESTDIR/dummyssh\"" "ssh://user@dummy/a repo"
+  $ hg clone --ssh "\"$PYTHON\" \"$TESTDIR/dummyssh\"" "ssh://user@dummy/a repo"
   destination directory: a repo
   abort: destination 'a repo' is not empty
   [255]
@@ -363,7 +363,7 @@
   > export SSH_ORIGINAL_COMMAND
   > PYTHONPATH="$PYTHONPATH"
   > export PYTHONPATH
-  > $PYTHON "$TESTDIR/../contrib/hg-ssh" "$TESTTMP/a repo"
+  > "$PYTHON" "$TESTDIR/../contrib/hg-ssh" "$TESTTMP/a repo"
   > EOF
 
   $ hg id --ssh "sh ssh.sh" "ssh://user@dummy/a repo"
@@ -391,7 +391,7 @@
   > export SSH_ORIGINAL_COMMAND
   > PYTHONPATH="$PYTHONPATH"
   > export PYTHONPATH
-  > $PYTHON "$TESTDIR/../contrib/hg-ssh" --read-only "$TESTTMP/remote"
+  > "$PYTHON" "$TESTDIR/../contrib/hg-ssh" --read-only "$TESTTMP/remote"
   > EOF
 
   $ hg clone --ssh "sh ssh.sh" "ssh://user@dummy/$TESTTMP/remote" read-only-local
@@ -440,7 +440,7 @@
   > [paths]
   > default-push = ssh://user@dummy/remote
   > [ui]
-  > ssh = $PYTHON "$TESTDIR/dummyssh"
+  > ssh = "$PYTHON" "$TESTDIR/dummyssh"
   > [extensions]
   > localwrite = localwrite.py
   > EOF
@@ -526,11 +526,11 @@
 
   $ echo "pretxnchangegroup.fail = python:$TESTTMP/failhook:hook" >> remote/.hg/hgrc
 
-  $ hg -q --config ui.ssh="$PYTHON $TESTDIR/dummyssh" clone ssh://user@dummy/remote hookout
+  $ hg -q --config ui.ssh="\"$PYTHON\" $TESTDIR/dummyssh" clone ssh://user@dummy/remote hookout
   $ cd hookout
   $ touch hookfailure
   $ hg -q commit -A -m 'remote hook failure'
-  $ hg --config ui.ssh="$PYTHON $TESTDIR/dummyssh" push
+  $ hg --config ui.ssh="\"$PYTHON\" $TESTDIR/dummyssh" push
   pushing to ssh://user@dummy/remote
   searching for changes
   remote: adding changesets
@@ -551,7 +551,7 @@
   > [extensions]
   > crash = ${TESTDIR}/crashgetbundler.py
   > EOF
-  $ hg --config ui.ssh="$PYTHON $TESTDIR/dummyssh" pull
+  $ hg --config ui.ssh="\"$PYTHON\" $TESTDIR/dummyssh" pull
   pulling from ssh://user@dummy/remote
   searching for changes
   adding changesets

--- a/tests/test-ssh-clone-r.t	Mon Jun 26 15:28:28 2017 -0700
+++ b/tests/test-ssh-clone-r.t	Fri Jul 07 01:05:20 2017 -0400
@@ -17,7 +17,7 @@
 clone remote via stream
 
   $ for i in 0 1 2 3 4 5 6 7 8; do
-  >    hg clone -e "$PYTHON \"$TESTDIR/dummyssh\"" --uncompressed -r "$i" ssh://user@dummy/remote test-"$i"
+  >    hg clone -e "\"$PYTHON\" \"$TESTDIR/dummyssh\"" --uncompressed -r "$i" ssh://user@dummy/remote test-"$i"
   >    if cd test-"$i"; then
   >       hg verify
   >       cd ..
@@ -139,7 +139,7 @@
   4 files, 9 changesets, 7 total revisions
   $ cd ..
   $ cd test-1
-  $ hg pull -e "$PYTHON \"$TESTDIR/dummyssh\"" -r 4 ssh://user@dummy/remote
+  $ hg pull -e "\"$PYTHON\" \"$TESTDIR/dummyssh\"" -r 4 ssh://user@dummy/remote
   pulling from ssh://user@dummy/remote
   searching for changes
   adding changesets
@@ -153,7 +153,7 @@
   crosschecking files in changesets and manifests
   checking files
   1 files, 3 changesets, 2 total revisions
-  $ hg pull -e "$PYTHON \"$TESTDIR/dummyssh\"" ssh://user@dummy/remote
+  $ hg pull -e "\"$PYTHON\" \"$TESTDIR/dummyssh\"" ssh://user@dummy/remote
   pulling from ssh://user@dummy/remote
   searching for changes
   adding changesets
@@ -163,7 +163,7 @@
   (run 'hg update' to get a working copy)
   $ cd ..
   $ cd test-2
-  $ hg pull -e "$PYTHON \"$TESTDIR/dummyssh\"" -r 5 ssh://user@dummy/remote
+  $ hg pull -e "\"$PYTHON\" \"$TESTDIR/dummyssh\"" -r 5 ssh://user@dummy/remote
   pulling from ssh://user@dummy/remote
   searching for changes
   adding changesets
@@ -177,7 +177,7 @@
   crosschecking files in changesets and manifests
   checking files
   1 files, 5 changesets, 3 total revisions
-  $ hg pull -e "$PYTHON \"$TESTDIR/dummyssh\"" ssh://user@dummy/remote
+  $ hg pull -e "\"$PYTHON\" \"$TESTDIR/dummyssh\"" ssh://user@dummy/remote
   pulling from ssh://user@dummy/remote
   searching for changes
   adding changesets

--- a/tests/test-ssh.t	Mon Jun 26 15:28:28 2017 -0700
+++ b/tests/test-ssh.t	Fri Jul 07 01:05:20 2017 -0400
@@ -38,21 +38,21 @@
 
 repo not found error
 
-  $ hg clone -e "$PYTHON \"$TESTDIR/dummyssh\"" ssh://user@dummy/nonexistent local
+  $ hg clone -e "\"$PYTHON\" \"$TESTDIR/dummyssh\"" ssh://user@dummy/nonexistent local
   remote: abort: repository nonexistent not found!
   abort: no suitable response from remote hg!
   [255]
 
 non-existent absolute path
 
-  $ hg clone -e "$PYTHON \"$TESTDIR/dummyssh\"" ssh://user@dummy/`pwd`/nonexistent local
+  $ hg clone -e "\"$PYTHON\" \"$TESTDIR/dummyssh\"" ssh://user@dummy/`pwd`/nonexistent local
   remote: abort: repository $TESTTMP/nonexistent not found!
   abort: no suitable response from remote hg!
   [255]
 
 clone remote via stream
 
-  $ hg clone -e "$PYTHON \"$TESTDIR/dummyssh\"" --uncompressed ssh://user@dummy/remote local-stream
+  $ hg clone -e "\"$PYTHON\" \"$TESTDIR/dummyssh\"" --uncompressed ssh://user@dummy/remote local-stream
   streaming all changes
   4 files to transfer, 602 bytes of data
   transferred 602 bytes in * seconds (*) (glob)
@@ -74,7 +74,7 @@
 clone bookmarks via stream
 
   $ hg -R local-stream book mybook
-  $ hg clone -e "$PYTHON \"$TESTDIR/dummyssh\"" --uncompressed ssh://user@dummy/local-stream stream2
+  $ hg clone -e "\"$PYTHON\" \"$TESTDIR/dummyssh\"" --uncompressed ssh://user@dummy/local-stream stream2
   streaming all changes
   4 files to transfer, 602 bytes of data
   transferred 602 bytes in * seconds (*) (glob)
@@ -90,7 +90,7 @@
 
 clone remote via pull
 
-  $ hg clone -e "$PYTHON \"$TESTDIR/dummyssh\"" ssh://user@dummy/remote local
+  $ hg clone -e "\"$PYTHON\" \"$TESTDIR/dummyssh\"" ssh://user@dummy/remote local
   requesting all changes
   adding changesets
   adding manifests
@@ -117,14 +117,14 @@
 
   $ hg paths
   default = ssh://user@dummy/remote
-  $ hg pull -e "$PYTHON \"$TESTDIR/dummyssh\""
+  $ hg pull -e "\"$PYTHON\" \"$TESTDIR/dummyssh\""
   pulling from ssh://user@dummy/remote
   searching for changes
   no changes found
 
 pull from wrong ssh URL
 
-  $ hg pull -e "$PYTHON \"$TESTDIR/dummyssh\"" ssh://user@dummy/doesnotexist
+  $ hg pull -e "\"$PYTHON\" \"$TESTDIR/dummyssh\"" ssh://user@dummy/doesnotexist
   pulling from ssh://user@dummy/doesnotexist
   remote: abort: repository doesnotexist not found!
   abort: no suitable response from remote hg!
@@ -139,7 +139,7 @@
 
   $ echo "default-push = ssh://user@dummy/remote" >> .hg/hgrc
   $ echo "[ui]" >> .hg/hgrc
-  $ echo "ssh = $PYTHON \"$TESTDIR/dummyssh\"" >> .hg/hgrc
+  $ echo "ssh = \"$PYTHON\" \"$TESTDIR/dummyssh\"" >> .hg/hgrc
 
 find outgoing
 
@@ -156,7 +156,7 @@
 
 find incoming on the remote side
 
-  $ hg incoming -R ../remote -e "$PYTHON \"$TESTDIR/dummyssh\"" ssh://user@dummy/local
+  $ hg incoming -R ../remote -e "\"$PYTHON\" \"$TESTDIR/dummyssh\"" ssh://user@dummy/local
   comparing with ssh://user@dummy/local
   searching for changes
   changeset:   3:a28a9d1a809c
@@ -169,7 +169,7 @@
 
 find incoming on the remote side (using absolute path)
 
-  $ hg incoming -R ../remote -e "$PYTHON \"$TESTDIR/dummyssh\"" "ssh://user@dummy/`pwd`"
+  $ hg incoming -R ../remote -e "\"$PYTHON\" \"$TESTDIR/dummyssh\"" "ssh://user@dummy/`pwd`"
   comparing with ssh://user@dummy/$TESTTMP/local
   searching for changes
   changeset:   3:a28a9d1a809c
@@ -216,7 +216,7 @@
 test pushkeys and bookmarks
 
   $ cd ../local
-  $ hg debugpushkey --config ui.ssh="$PYTHON \"$TESTDIR/dummyssh\"" ssh://user@dummy/remote namespaces
+  $ hg debugpushkey --config ui.ssh="\"$PYTHON\" \"$TESTDIR/dummyssh\"" ssh://user@dummy/remote namespaces
   bookmarks	
   namespaces	
   phases	
@@ -231,7 +231,7 @@
   no changes found
   exporting bookmark foo
   [1]
-  $ hg debugpushkey --config ui.ssh="$PYTHON \"$TESTDIR/dummyssh\"" ssh://user@dummy/remote bookmarks
+  $ hg debugpushkey --config ui.ssh="\"$PYTHON\" \"$TESTDIR/dummyssh\"" ssh://user@dummy/remote bookmarks
   foo	1160648e36cec0054048a7edc4110c6f84fde594
   $ hg book -f foo
   $ hg push --traceback
@@ -311,7 +311,7 @@
   $ hg -R ../remote bookmark test
   $ hg -R ../remote bookmarks
    * test                      4:6c0482d977a3
-  $ hg clone -e "$PYTHON \"$TESTDIR/dummyssh\"" ssh://user@dummy/remote local-bookmarks
+  $ hg clone -e "\"$PYTHON\" \"$TESTDIR/dummyssh\"" ssh://user@dummy/remote local-bookmarks
   requesting all changes
   adding changesets
   adding manifests
@@ -338,21 +338,21 @@
 
 Test remote paths with spaces (issue2983):
 
-  $ hg init --ssh "$PYTHON \"$TESTDIR/dummyssh\"" "ssh://user@dummy/a repo"
+  $ hg init --ssh "\"$PYTHON\" \"$TESTDIR/dummyssh\"" "ssh://user@dummy/a repo"
   $ touch "$TESTTMP/a repo/test"
   $ hg -R 'a repo' commit -A -m "test"
   adding test
   $ hg -R 'a repo' tag tag
-  $ hg id --ssh "$PYTHON \"$TESTDIR/dummyssh\"" "ssh://user@dummy/a repo"
+  $ hg id --ssh "\"$PYTHON\" \"$TESTDIR/dummyssh\"" "ssh://user@dummy/a repo"
   73649e48688a
 
-  $ hg id --ssh "$PYTHON \"$TESTDIR/dummyssh\"" "ssh://user@dummy/a repo#noNoNO"
+  $ hg id --ssh "\"$PYTHON\" \"$TESTDIR/dummyssh\"" "ssh://user@dummy/a repo#noNoNO"
   abort: unknown revision 'noNoNO'!
   [255]
 
 Test (non-)escaping of remote paths with spaces when cloning (issue3145):
 
-  $ hg clone --ssh "$PYTHON \"$TESTDIR/dummyssh\"" "ssh://user@dummy/a repo"
+  $ hg clone --ssh "\"$PYTHON\" \"$TESTDIR/dummyssh\"" "ssh://user@dummy/a repo"
   destination directory: a repo
   abort: destination 'a repo' is not empty
   [255]
@@ -380,7 +380,7 @@
   > export SSH_ORIGINAL_COMMAND
   > PYTHONPATH="$PYTHONPATH"
   > export PYTHONPATH
-  > $PYTHON "$TESTDIR/../contrib/hg-ssh" "$TESTTMP/a repo"
+  > "$PYTHON" "$TESTDIR/../contrib/hg-ssh" "$TESTTMP/a repo"
   > EOF
 
   $ hg id --ssh "sh ssh.sh" "ssh://user@dummy/a repo"
@@ -408,7 +408,7 @@
   > export SSH_ORIGINAL_COMMAND
   > PYTHONPATH="$PYTHONPATH"
   > export PYTHONPATH
-  > $PYTHON "$TESTDIR/../contrib/hg-ssh" --read-only "$TESTTMP/remote"
+  > "$PYTHON" "$TESTDIR/../contrib/hg-ssh" --read-only "$TESTTMP/remote"
   > EOF
 
   $ hg clone --ssh "sh ssh.sh" "ssh://user@dummy/$TESTTMP/remote" read-only-local
@@ -455,7 +455,7 @@
   > [paths]
   > default-push = ssh://user@dummy/remote
   > [ui]
-  > ssh = $PYTHON "$TESTDIR/dummyssh"
+  > ssh = "$PYTHON" "$TESTDIR/dummyssh"
   > [extensions]
   > localwrite = localwrite.py
   > EOF
@@ -543,11 +543,11 @@
 
   $ echo "pretxnchangegroup.fail = python:$TESTTMP/failhook:hook" >> remote/.hg/hgrc
 
-  $ hg -q --config ui.ssh="$PYTHON $TESTDIR/dummyssh" clone ssh://user@dummy/remote hookout
+  $ hg -q --config ui.ssh="\"$PYTHON\" $TESTDIR/dummyssh" clone ssh://user@dummy/remote hookout
   $ cd hookout
   $ touch hookfailure
   $ hg -q commit -A -m 'remote hook failure'
-  $ hg --config ui.ssh="$PYTHON $TESTDIR/dummyssh" push
+  $ hg --config ui.ssh="\"$PYTHON\" $TESTDIR/dummyssh" push
   pushing to ssh://user@dummy/remote
   searching for changes
   remote: adding changesets
@@ -569,7 +569,7 @@
   > [extensions]
   > crash = ${TESTDIR}/crashgetbundler.py
   > EOF
-  $ hg --config ui.ssh="$PYTHON $TESTDIR/dummyssh" pull
+  $ hg --config ui.ssh="\"$PYTHON\" $TESTDIR/dummyssh" pull
   pulling from ssh://user@dummy/remote
   searching for changes
   remote: abort: this is an exercise

--- a/tests/test-subrepo-relative-path.t	Mon Jun 26 15:28:28 2017 -0700
+++ b/tests/test-subrepo-relative-path.t	Fri Jul 07 01:05:20 2017 -0400
@@ -74,7 +74,7 @@
 
 subrepo paths with ssh urls
 
-  $ hg clone -e "$PYTHON \"$TESTDIR/dummyssh\"" ssh://user@dummy/cloned sshclone
+  $ hg clone -e "\"$PYTHON\" \"$TESTDIR/dummyssh\"" ssh://user@dummy/cloned sshclone
   requesting all changes
   adding changesets
   adding manifests
@@ -89,7 +89,7 @@
   added 1 changesets with 1 changes to 1 files
   3 files updated, 0 files merged, 0 files removed, 0 files unresolved
 
-  $ hg -R sshclone push -e "$PYTHON \"$TESTDIR/dummyssh\"" ssh://user@dummy/`pwd`/cloned
+  $ hg -R sshclone push -e "\"$PYTHON\" \"$TESTDIR/dummyssh\"" ssh://user@dummy/`pwd`/cloned
   pushing to ssh://user@dummy/$TESTTMP/cloned
   pushing subrepo sub to ssh://user@dummy/$TESTTMP/sub
   searching for changes

--- a/tests/test-wireproto.t	Mon Jun 26 15:28:28 2017 -0700
+++ b/tests/test-wireproto.t	Fri Jul 07 01:05:20 2017 -0400
@@ -147,13 +147,13 @@
 
 SSH (try to exercise the ssh functionality with a dummy script):
 
-  $ hg debugwireargs --ssh "$PYTHON $TESTDIR/dummyssh" ssh://user@dummy/repo uno due tre quattro
+  $ hg debugwireargs --ssh "\"$PYTHON\" $TESTDIR/dummyssh" ssh://user@dummy/repo uno due tre quattro
   uno due tre quattro None
-  $ hg debugwireargs --ssh "$PYTHON $TESTDIR/dummyssh" ssh://user@dummy/repo eins zwei --four vier
+  $ hg debugwireargs --ssh "\"$PYTHON\" $TESTDIR/dummyssh" ssh://user@dummy/repo eins zwei --four vier
   eins zwei None vier None
-  $ hg debugwireargs --ssh "$PYTHON $TESTDIR/dummyssh" ssh://user@dummy/repo eins zwei
+  $ hg debugwireargs --ssh "\"$PYTHON\" $TESTDIR/dummyssh" ssh://user@dummy/repo eins zwei
   eins zwei None None None
-  $ hg debugwireargs --ssh "$PYTHON $TESTDIR/dummyssh" ssh://user@dummy/repo eins zwei --five fuenf
+  $ hg debugwireargs --ssh "\"$PYTHON\" $TESTDIR/dummyssh" ssh://user@dummy/repo eins zwei --five fuenf
   eins zwei None None None
 
 Explicitly kill daemons to let the test exit on Windows