[PATCH] t4205: don't rely on en_US.UTF-8 locale existing

[John Keeping <john@keeping.me.uk>]

My system doesn't have the en_US.UTF-8 locale (or plain en_US), which
causes t4205 to fail by counting bytes instead of UTF-8 codepoints.

Instead of using sed for this, use Perl which behaves predictably
whatever locale is in use.

Signed-off-by: John Keeping <john@keeping.me.uk>
---
This patch is on top of 'as/log-output-encoding-in-user-format'.

 t/t4205-log-pretty-formats.sh | 8 +++-----
 1 file changed, 3 insertions(+), 5 deletions(-)

diff --git a/t/t4205-log-pretty-formats.sh b/t/t4205-log-pretty-formats.sh
index 3cfb744..5864f5b 100755
--- a/t/t4205-log-pretty-formats.sh
+++ b/t/t4205-log-pretty-formats.sh
@@ -20,9 +20,7 @@ commit_msg () {
 		# cut string, replace cut part with two dots
 		# $2 - chars count from the beginning of the string
 		# $3 - "trailing" chars
-		# LC_ALL is set to make `sed` interpret "." as a UTF-8 char not a byte
-		# as it does with C locale
-		msg=$(echo $msg | LC_ALL=en_US.UTF-8 sed -e "s/^\(.\{$2\}\)$3/\1../")
+		msg=$(echo $msg | "$PERL_PATH" -CIO -pe "s/^(.{$2})$3/\1../")
 	fi
 	echo $msg
 }
@@ -205,7 +203,7 @@ test_expect_success 'left alignment formatting with ltrunc' "
 ..sage two
 ..sage one
 add bar  Z
-$(commit_msg "" "0" ".\{11\}")
+$(commit_msg "" "0" ".{11}")
 EOF
 	test_cmp expected actual
 "
@@ -218,7 +216,7 @@ test_expect_success 'left alignment formatting with mtrunc' "
 mess.. two
 mess.. one
 add bar  Z
-$(commit_msg "" "4" ".\{11\}")
+$(commit_msg "" "4" ".{11}")
 EOF
 	test_cmp expected actual
 "
-- 
1.8.3.1.747.g77f7d3a