ci/lib: use echo instead of printf to set up sections

We use printf to set up sections with GitLab CI even though we could
trivially use echo. This may cause problems in case the argument passed
to `begin_group ()` or `end_group ()` contains formatting directives as
we use them as part of the formatting string.

Simplify the code to instead use echo.

Signed-off-by: Patrick Steinhardt <[email protected]>
Signed-off-by: Junio C Hamano <[email protected]>

Author: pks-t

ci/lib.sh

@@ -18,7 +18,7 @@ elif test true = "$GITLAB_CI"
 then
 	begin_group () {
 		need_to_end_group=t
-		printf "\e[0Ksection_start:$(date +%s):$(echo "$1" | tr ' ' _)[collapsed=true]\r\e[0K$1\n"
+		echo "\e[0Ksection_start:$(date +%s):$(echo "$1" | tr ' ' _)[collapsed=true]\r\e[0K$1"
 		trap "end_group '$1'" EXIT
 		set -x
 	}
@@ -27,7 +27,7 @@ then
 		test -n "$need_to_end_group" || return 0
 		set +x
 		need_to_end_group=
-		printf "\e[0Ksection_end:$(date +%s):$(echo "$1" | tr ' ' _)\r\e[0K\n"
+		echo "\e[0Ksection_end:$(date +%s):$(echo "$1" | tr ' ' _)\r\e[0K"
 		trap - EXIT
 	}
 else