tests: relax histedit issue4251 and issue3893 backups

I'm globbing these because some are globbed, and this pair
gets in the way of the main parts of the series.

tests/test-histedit-arguments.t

@@ -253,7 +253,7 b' short hash. This tests issue3893.'
   1 files updated, 0 files merged, 0 files removed, 0 files unresolved
   0 files updated, 0 files merged, 0 files removed, 0 files unresolved
   saved backup bundle to $TESTTMP/foo/.hg/strip-backup/*-backup.hg (glob)
-  saved backup bundle to $TESTTMP/foo/.hg/strip-backup/c8e68270e35a-23a13bf9-backup.hg (glob)
+  saved backup bundle to $TESTTMP/foo/.hg/strip-backup/*-backup.hg (glob)
 
   $ hg update -q 2
   $ echo x > x

tests/test-histedit-commute.t

@@ -424,7 +424,7 b" Now, let's try to fold the second commit"
   0 files updated, 0 files merged, 0 files removed, 0 files unresolved
   0 files updated, 0 files merged, 0 files removed, 0 files unresolved
   saved backup bundle to $TESTTMP/issue4251/.hg/strip-backup/*-backup.hg (glob)
-  saved backup bundle to $TESTTMP/issue4251/.hg/strip-backup/b0f4233702ca-d99e7186-backup.hg (glob)
+  saved backup bundle to $TESTTMP/issue4251/.hg/strip-backup/*-backup.hg (glob)
 
   $ hg --config diff.git=yes export 0
   # HG changeset patch