/usr/share/lintian/overrides/libignition-math2 is in libignition-math2 2.2.3+dfsg1-4.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 | # Upstream names library as libignition-math
package-name-doesnt-match-sonames libignition-math2-2
|