py3: fix test-shelve.t on Python 3

We get a better error message out of the abort here, which is fine.

Differential Revision: https://phab.mercurial-scm.org/D3351

contrib/python3-whitelist

@@ -398,6 +398,7 test-schemes.t
 test-serve.t
 test-setdiscovery.t
 test-share.t
+test-shelve.t
 test-show-stack.t
 test-show-work.t
 test-show.t

tests/test-shelve.t

@@ -1273,7 +1273,7 Wreak havoc on the unshelve process
   $ rm .hg/unshelverebasestate
   $ hg unshelve --abort
   unshelve of 'default' aborted
-  abort: $ENOENT$
+  abort: $ENOENT$* (glob)
   [255]
 Can the user leave the current state?
   $ hg up -C .