[PATCH] tests: date: test -d with only a minus sign

[Collin Funk]

* tests/date/date.pl (@Tests): Add the test case.
---
 tests/date/date.pl | 1 +
 1 file changed, 1 insertion(+)

diff --git a/tests/date/date.pl b/tests/date/date.pl
index 95547e8b1..c685c3d3b 100755
--- a/tests/date/date.pl
+++ b/tests/date/date.pl
@@ -423,6 +423,7 @@ my @Tests =
 
      # A bare sign is the empty relative offset: midnight today.
      ['bare-plus', "-d '+' '+%H:%M:%S'", {OUT=>"00:00:00"}],
+     ['bare-minus', "-d '-' +%H:%M:%S", {OUT=>"00:00:00"}],
 
      # A trailing token after an \@epoch operand is an error.
      ['epoch-trailing', "-d '\@5 UTC' '+%T'",
-- 
2.54.0