The only allowed escape sequences are "*", "\?" and "\" (without quotes) to produce a literal star, question mark and backslash, respectively. Without the escaping backslash, the star and question mark take the role of globbing operators similar to shell globs which is why they have to be escaped. No other escapable characters than "*", "?" and "\" exist.
For more information please consult:
The tag is present in Lintian version
That is the most recent version we know about.
We use semantic versions.
The patch number is a commit step indicator relative to the
release tag in our Git
You can find the detection logic for this version at commit a1e47cb. For merge requests, please use the latest version in the Lintian check debian/copyright/dep5.