tests: clean up two wayward `python` invocations

These are also fallout from the check-code regex rewriting bug.

Differential Revision: https://phab.mercurial-scm.org/D2865

tests/test-narrow-clone-non-narrow-server.t

@@ -1,53 +1,53
 Test attempting a narrow clone against a server that doesn't support narrowhg.
 
   $ . "$TESTDIR/narrow-library.sh"
 
   $ hg init master
   $ cd master
 
   $ for x in `$TESTDIR/seq.py 10`; do
   >   echo $x > "f$x"
   >   hg add "f$x"
   >   hg commit -m "Add $x"
   > done
 
   $ hg serve -a localhost -p $HGPORT1 --config extensions.narrow=! -d \
   >    --pid-file=hg.pid
   $ cat hg.pid >> "$DAEMON_PIDS"
   $ hg serve -a localhost -p $HGPORT2 -d --pid-file=hg.pid
   $ cat hg.pid >> "$DAEMON_PIDS"
 
 Verify that narrow is advertised in the bundle2 capabilities:
   $ echo hello | hg -R . serve --stdio | \
-  >   python -c "import sys, urllib; print urllib.unquote_plus(list(sys.stdin)[1])" | grep narrow
+  >   $PYTHON -c "import sys, urllib; print urllib.unquote_plus(list(sys.stdin)[1])" | grep narrow
   narrow=v0
 
   $ cd ..
 
   $ hg clone --narrow --include f1 http://localhost:$HGPORT1/ narrowclone
   requesting all changes
   abort: server doesn't support narrow clones
   [255]
 
 Make a narrow clone (via HGPORT2), then try to narrow and widen
 into it (from HGPORT1) to prove that narrowing is fine and widening fails
 gracefully:
   $ hg clone -r 0 --narrow --include f1 http://localhost:$HGPORT2/ narrowclone
   adding changesets
   adding manifests
   adding file changes
   added 1 changesets with 1 changes to 1 files
   new changesets * (glob)
   updating to branch default
   1 files updated, 0 files merged, 0 files removed, 0 files unresolved
   $ cd narrowclone
   $ hg tracked --addexclude f2 http://localhost:$HGPORT1/
   comparing with http://localhost:$HGPORT1/
   searching for changes
   looking for local changes to affected paths
   $ hg tracked --addinclude f1 http://localhost:$HGPORT1/
   comparing with http://localhost:$HGPORT1/
   searching for changes
   no changes found
   abort: server doesn't support narrow clones
   [255]

tests/test-sparse-clone.t

@@ -1,72 +1,72
 test sparse
 
   $ cat >> $HGRCPATH << EOF
   > [ui]
-  > ssh = python "$RUNTESTDIR/dummyssh"
+  > ssh = $PYTHON "$RUNTESTDIR/dummyssh"
   > username = nobody <[e-mail]>
   > [extensions]
   > sparse=
   > purge=
   > strip=
   > rebase=
   > EOF
 
   $ hg init myrepo
   $ cd myrepo
   $ echo a > index.html
   $ echo x > data.py
   $ echo z > readme.txt
   $ cat > webpage.sparse <<EOF
   > [include]
   > *.html
   > EOF
   $ cat > backend.sparse <<EOF
   > [include]
   > *.py
   > EOF
   $ hg ci -Aqm 'initial'
   $ cd ..
 
 Verify local clone with a sparse profile works
 
   $ hg clone --enable-profile webpage.sparse myrepo clone1
   updating to branch default
   warning: sparse profile 'webpage.sparse' not found in rev 000000000000 - ignoring it
   1 files updated, 0 files merged, 0 files removed, 0 files unresolved
   $ cd clone1
   $ ls
   index.html
   $ cd ..
 
 Verify local clone with include works
 
   $ hg clone --include *.sparse myrepo clone2
   updating to branch default
   2 files updated, 0 files merged, 0 files removed, 0 files unresolved
   $ cd clone2
   $ ls
   backend.sparse
   webpage.sparse
   $ cd ..
 
 Verify local clone with exclude works
 
   $ hg clone --exclude data.py myrepo clone3
   updating to branch default
   4 files updated, 0 files merged, 0 files removed, 0 files unresolved
   $ cd clone3
   $ ls
   backend.sparse
   index.html
   readme.txt
   webpage.sparse
   $ cd ..
 
 Verify sparse clone profile over ssh works
 
   $ hg clone -q --enable-profile webpage.sparse ssh://user@dummy/myrepo clone4
   warning: sparse profile 'webpage.sparse' not found in rev 000000000000 - ignoring it
   $ cd clone4
   $ ls
   index.html
   $ cd ..