patch 8.2.4552: in a :def function "put = expr" does not work Commit: https://github.com/vim/vim/commit/d0b7bfa95798f5ec743d8afffbffb83aeac823da Author: Bram Moolenaar <Bram@vim.org> Date: Sat Mar 12 14:51:16 2022 +0000 patch 8.2.4552: in a :def function "put = expr" does not work Problem: In a :def function "put = expr" does not work. Solution: Skip over white space. (closes https://github.com/vim/vim/issues/9936)

#!/bin/bash
set -e

apt-get install -y xvfb

cat <<EOT >/etc/systemd/system/xvfb.service
[Unit]
Description=X Virtual Frame Buffer Service
After=network.target
[Service]
ExecStart=/usr/bin/Xvfb :99 -screen 0 1024x768x24
[Install]
WantedBy=multi-user.target
EOT

systemctl enable xvfb.service
systemctl start xvfb.service