I have a sample output of `apt-cache policy $PACKAGE` in my script
comments:
```
# Installed: 2.0.8
# Candidate: 2.0.10
# Version table:
# 2.0.10 500
# 500 https://deb...com/apt/debian bionic/main arm64 Packages
# 500 https://deb...com/apt/debian bionic/main armhf Packages
# *** 2.0.8 100
# 100 /var/lib/dpkg/status
```
Lintian is triggered by the last line. If i change `dpkg` to `_dpkg` in
it, the warning uses-gpkg-database-directly is gone.
The script first line is `#!/bin/sh`