[clang-tools-extra] [clang-tidy] Fix readability-else-after-return for if statements appear in unbraced switch case labels (PR #181878)

[Victor Chernyakin via cfe-commits]

================
@@ -231,6 +231,10 @@ Changes in existing checks
   <clang-tidy/checks/readability/container-size-empty>` check by fixing a crash
   when a member expression has a non-identifier name.
 
+- Improved :doc:`readability-else-after-return
+  <clang-tidy/checks/readability/else-after-return>` check by fixing missed
+  diagnostics when ``if`` statements appear in unbraced ``switch`` case labels
----------------
localspook wrote:

```suggestion
  diagnostics when ``if`` statements appear in unbraced ``switch`` case labels.
```

https://github.com/llvm/llvm-project/pull/181878