tests/test-remotefilelog-strip.t

tests: fix glob pattern for dynamic timer alignment

The number of space characters varies depending on the number of digits of the
timer, making some tests fail on slow machines in an unintended way:

```diff
--- /build/mercurial-6.1/tests/test-merge-halt.t
+++ /build/mercurial-6.1/tests/test-merge-halt.t.err
@@ -210,6 +210,6 @@
   merge halted after failed merge (see hg resolve)
   [240]
   $ hg shelve --list
-  default         (* ago)    changes to: foo (glob)
+  default         (11s ago)   changes to: foo
   $ hg unshelve --abort
   unshelve of 'default' aborted
ERROR: test-merge-halt.t output changed
```

Differential Revision: https://phab.mercurial-scm.org/D12381

#require no-windows

  $ . "$TESTDIR/remotefilelog-library.sh"

  $ hg init master
  $ cd master
  $ cat >> .hg/hgrc <<EOF
  > [remotefilelog]
  > server=True
  > EOF
  $ echo x > x
  $ hg commit -qAm x

  $ cd ..

  $ hgcloneshallow ssh://user@dummy/master shallow -q
  1 files fetched over 1 fetches - (1 misses, 0.00% hit ratio) over *s (glob)
  $ cd shallow

  $ cat >> $TESTTMP/get_file_linknode.py <<EOF
  > from mercurial import node, registrar, scmutil
  > cmdtable = {}
  > command = registrar.command(cmdtable)
  > @command(b'debug-file-linknode', [(b'r', b'rev', b'.', b'rev')], b'hg debug-file-linknode FILE')
  > def debug_file_linknode(ui, repo, file, **opts):
  >   rflctx = scmutil.revsingle(repo.unfiltered(), opts['rev']).filectx(file)
  >   ui.status(b'%s\n' % node.hex(rflctx.ancestormap()[rflctx._filenode][2]))
  > EOF

  $ cat >> .hg/hgrc <<EOF
  > [ui]
  > interactive=1
  > [extensions]
  > strip=
  > get_file_linknode=$TESTTMP/get_file_linknode.py
  > [experimental]
  > evolution=createmarkers,allowunstable
  > EOF
  $ echo a > a
  $ hg commit -qAm msg1
  $ hg commit --amend 're:^$' -m msg2
  $ hg commit --amend 're:^$' -m msg3
  $ hg --hidden log -G -T '{rev} {node|short}'
  @  3 df91f74b871e
  |
  | x  2 70494d7ec5ef
  |/
  | x  1 1e423846dde0
  |/
  o  0 b292c1e3311f
  
  $ hg debug-file-linknode -r 70494d a
  df91f74b871e064c89afa1fe9e2f66afa2c125df
  $ hg --hidden strip -r 1 3
  0 files updated, 0 files merged, 1 files removed, 0 files unresolved
  saved backup bundle to $TESTTMP/shallow/.hg/strip-backup/df91f74b871e-c94d67be-backup.hg

  $ hg --hidden log -G -T '{rev} {node|short}'
  o  1 70494d7ec5ef
  |
  @  0 b292c1e3311f
  
Demonstrate that the linknode points to a commit that is actually in the repo
after the strip operation. Otherwise remotefilelog has to search every commit in
the repository looking for a valid linkrev every time it's queried, such as
during push.
  $ hg debug-file-linknode -r 70494d a
  70494d7ec5ef6cd3cd6939a9fd2812f9956bf553