tests: support URL quoting on Python 3

We could use mercurial.urllibcompat, but meh. This makes things
easier to read.

The test still fails on Python 3 for some reason. But at least
we no longer have an exception.

Differential Revision: https://phab.mercurial-scm.org/D5669

tests/test-mq-subrepo-svn.t

@@ -1,56 +1,63
 #require svn13
 
   $ cat <<EOF >> $HGRCPATH
   > [extensions]
   > mq =
   > [diff]
   > nodates = 1
   > [subrepos]
   > allowed = true
   > svn:allowed = true
   > EOF
 
 fn to create new repository, and cd into it
   $ mkrepo() {
   >     hg init $1
   >     cd $1
   >     hg qinit
   > }
 
 
 handle svn subrepos safely
 
   $ svnadmin create svn-repo-2499
 
   $ SVNREPOPATH=`pwd`/svn-repo-2499/project
+
+#if py3
+  $ pathquoted=`"$PYTHON" -c "import sys, urllib.parse; sys.stdout.write(urllib.parse.quote(sys.argv[1]))" "$SVNREPOPATH"`
+#else
+  $ pathquoted=`"$PYTHON" -c "import sys, urllib; sys.stdout.write(urllib.quote(sys.argv[1]))" "$SVNREPOPATH"`
+#endif
+
 #if windows
-  $ SVNREPOURL=file:///`"$PYTHON" -c "import urllib, sys; sys.stdout.write(urllib.quote(sys.argv[1]))" "$SVNREPOPATH"`
+  $ SVNREPOURL=file:///$pathquoted
 #else
-  $ SVNREPOURL=file://`"$PYTHON" -c "import urllib, sys; sys.stdout.write(urllib.quote(sys.argv[1]))" "$SVNREPOPATH"`
+  $ SVNREPOURL=file://$pathquoted
 #endif
 
   $ mkdir -p svn-project-2499/trunk
   $ svn import -qm 'init project' svn-project-2499 "$SVNREPOURL"
 
 qnew on repo w/svn subrepo
   $ mkrepo repo-2499-svn-subrepo
   $ svn co "$SVNREPOURL"/trunk sub
   Checked out revision 1.
   $ echo 'sub = [svn]sub' >> .hgsub
   $ hg add .hgsub
   $ hg status -S -X '**/format'
   A .hgsub
   $ hg qnew -m0 0.diff
   $ cd sub
   $ echo a > a
   $ svn add a
   A         a
   $ svn st
   A*    a (glob)
   $ cd ..
   $ hg status -S        # doesn't show status for svn subrepos (yet)
   $ hg qnew -m1 1.diff
   abort: uncommitted changes in subrepository "sub"
   [255]
 
   $ cd ..