ci: run gem with sudo to install asciidoctor

dscho · gitster · commit 4fef6321a5eb · 2020-04-10T10:30:40.000-07:00
In a later patch, we will run Documentation job in GitHub Actions.
The job will run without elevated permission.

Run `gem` with `sudo` to elevate permission in order to be able to
install to system location.
This will also keep this installation in-line with other installation in
our Linux system for CI.

Signed-off-by: Johannes Schindelin &lt;johannes.schindelin@gmx.de&gt;
[Danh: reword commit message]
Signed-off-by: Đoàn Trần Công Danh &lt;congdanhqx@gmail.com&gt;
Signed-off-by: Junio C Hamano &lt;gitster@pobox.com&gt;
diff --git a/ci/install-dependencies.sh b/ci/install-dependencies.sh
@@ -70,7 +70,7 @@ Documentation)
 	sudo apt-get -q -y install asciidoc xmlto docbook-xsl-ns make
 
 	test -n "$ALREADY_HAVE_ASCIIDOCTOR" ||
-	gem install --version 1.5.8 asciidoctor
+	sudo gem install --version 1.5.8 asciidoctor
 	;;
 linux-gcc-4.8|GETTEXT_POISON)
 	sudo apt-get -q update
