[PATCH] t7508: avoid non POSIX BRE

24c30e0b6 (wt-status: tolerate dangling marks, 2020-09-01) adds a test
that uses a BRE which breaks at least with OpenBSD's grep.

switch to an ERE as it is done for similar checks and while at it, remove
the now obsolete test_i18ngrep call.

Signed-off-by: Carlo Marcelo Arenas Belón <redacted>
---
 t/t7508-status.sh | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/t/t7508-status.sh b/t/t7508-status.sh
index 2b72451ba3..05c6c02435 100755
--- a/t/t7508-status.sh
+++ b/t/t7508-status.sh

@@ -882,7 +882,7 @@ test_expect_success 'status shows detached HEAD properly after checking out non-
 	git clone upstream downstream &&
 	git -C downstream checkout @{u} &&
 	git -C downstream status >actual &&
-	test_i18ngrep "HEAD detached at [0-9a-f]\\+" actual
+	grep -E "HEAD detached at [0-9a-f]+" actual
 '
 
 test_expect_success 'setup status submodule summary' '

-- 
2.32.0.826.g286871f41a