The check is currently *not* part of .clang-tidy. It complains about:
(1) "switch has multiple consecutive identical branches"
(2) "repeated branch in conditional chain"
About (1): Lots of findings in switches were about redundant
"[[fallthrough]]" in places where the compiler would not warn anyways. I
have cleaned these up.
About (2): In if-else_if-else chains, fixing the warning would usually
mean concatenating multiple if-conditions. As this would reduce
readability in most cases, I did not fix these places.
Because of (2), I also refrained from adding "bugprone-branch-clone" to
.clang-tidy.
