[PATCH v2] t6112: avoid tilde expansion

["SZEDER Gábor" <szeder.dev@gmail.com>]

e987df5fe6 (list-objects-filter: implement composite filters,
2019-06-27) introduced a test to "t6112-rev-list-filters-objects.sh"
that checks the output of a Git command with the following commands:

  grep ~$omitted_1 actual &&
  grep ~$omitted_2 actual &&
  grep ~$omitted_3 actual &&

Since the leading tilde in the pattern is not quoted/escaped, it is
subject to tilde expansion.  So if the system has a user whose
username happens to be "$omitted_1", then "grep" would look for that
user's home directory.

Quote those words starting with a tilde to avoid this.

Signed-off-by: SZEDER Gábor <szeder.dev@gmail.com>
---
Same diff, updated commit message.

 t/t6112-rev-list-filters-objects.sh | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/t/t6112-rev-list-filters-objects.sh b/t/t6112-rev-list-filters-objects.sh
index 39211ef989..e0a825bccf 100755
--- a/t/t6112-rev-list-filters-objects.sh
+++ b/t/t6112-rev-list-filters-objects.sh
@@ -623,9 +623,9 @@ test_expect_success 'verify collecting omits in combined: filter' '
 	omitted_2=$(echo a     | git hash-object --stdin) &&
 	omitted_3=$(echo abcde | git hash-object --stdin) &&
 
-	grep ~$omitted_1 actual &&
-	grep ~$omitted_2 actual &&
-	grep ~$omitted_3 actual &&
+	grep "~$omitted_1" actual &&
+	grep "~$omitted_2" actual &&
+	grep "~$omitted_3" actual &&
 	test_line_count = 3 actual
 '
 
-- 
2.54.0.655.g69726bb9dc