test-subrepo-mq-svn.t: correct comment

This fixes the description of a helper function in the test.

tests/test-mq-subrepo-svn.t

@@ -1,52 +1,52 b''
   $ "$TESTDIR/hghave" svn || exit 80
 
   $ echo "[extensions]" >> $HGRCPATH
   $ echo "mq=" >> $HGRCPATH
   $ echo "[diff]" >> $HGRCPATH
   $ echo "nodates=1" >> $HGRCPATH
 
-fn to create new repository w/dirty subrepo, and cd into it
+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
   $ curpath=`pwd | tr '\\\\' /`
   $ expr "$svnpath" : "\/" > /dev/null
   > if [ $? -ne 0 ]; then
   >   curpath="/$curpath"
   > fi
   $ svnurl="file://$curpath/svn-repo-2499/project"
   $ mkdir -p svn-project-2499/trunk
   $ svn import -m 'init project' svn-project-2499 "$svnurl"
   Adding         svn-project-2499/trunk
   
   Committed revision 1.
 
 qnew on repo w/svn subrepo
   $ mkrepo repo-2499-svn-subrepo
   $ svn co "$svnurl"/trunk sub
   Checked out revision 1.
   $ echo 'sub = [svn]sub' >> .hgsub
   $ hg add .hgsub
   $ hg status -S
   A .hgsub
   ? sub/.svn/entries
   $ hg qnew -m0 0.diff
   committing subrepository sub
   $ cd sub
   $ echo a > a
   $ svn add a
   A         a
   $ svn st
   A       a
   $ cd ..
   $ hg status -S        # doesn't show status for svn subrepos (yet)
   $ hg qnew -m1 1.diff
   abort: uncommitted changes in subrepository sub
   [255]