[clang-tidy] Fix a false positive in readability-simplify-boolean-expr

[LegalizeAdulthood]

LGTM

clang-tools-extra/clang-tidy/readability/SimplifyBooleanExprCheck.cpp

for (auto First = CS->body_begin(), Second = std::next(First),
          * if (Cond) return false; return true; -> return !Cond;
          */
         auto *If = cast<IfStmt>(*First);
         if (!If->hasInitStorage() && !If->hasVarStorage()) {
           ExprAndBool ThenReturnBool =
               checkSingleStatement(If->getThen(), parseReturnLiteralBool);
           if (ThenReturnBool &&
               ThenReturnBool.Bool != TrailingReturnBool.Bool) {
-            if (Check->ChainedConditionalReturn ||
-                (!PrevIf && If->getElse() == nullptr)) {
+            if ((Check->ChainedConditionalReturn || !PrevIf) &&
+                If->getElse() == nullptr) {
               Check->replaceCompoundReturnWithCondition(
                   Context, cast<ReturnStmt>(*Second), TrailingReturnBool.Bool,
                   If, ThenReturnBool.Item);
             }
           }
         }
       } else if (isa<LabelStmt, CaseStmt, DefaultStmt>(*First)) {
         /*

clang-tools-extra/test/clang-tidy/checkers/readability/simplify-bool-expr-chained-conditional-return.cpp

 }
 // CHECK-MESSAGES: :[[@LINE-4]]:12: warning: {{.*}} in conditional return
 // CHECK-FIXES: {{^}}bool complex_chained_if_return_return_negated(int i) {{{$}}
 // CHECK-FIXES: {{^}}  if (i < 5) {{{$}}
 // CHECK-FIXES: {{^}}    return false;{{$}}
 // CHECK-FIXES: {{^}}  }{{$}}
 // CHECK-FIXES: {{^  return i <= 10;$}}
 // CHECK-FIXES: {{^}$}}
+
+
+bool PR57819(int x) {
+  // False positive introduced in clang-tidy-15
+  // Expect no warning here.
+  if (x > 0)
+    return false;
+  else {
+  }
+  return true;
+}