All reports of invalid-escape-sequence-in-dep5-copyright for the archive. The extended description of this tag is:
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.
Refer to https://www.debian.org/doc/packaging-manuals/copyright-format/1.0/ for details.
This tag has not been emitted in any package tested by Lintian.