[clang] [analyzer][NFC] Clean up `MemRegion.cpp` and align with llvm coding style (PR #218860)

[Balázs Benics via cfe-commits]

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@@ -1230,9 +1227,9 @@ MemRegionManager::getCompoundLiteralRegion(const CompoundLiteralExpr *CL,
                                            const StackFrame *SF) {
   const MemSpaceRegion *sReg = nullptr;
 
-  if (CL->isFileScope())
+  if (CL->isFileScope()) {
     sReg = getGlobalsRegion();
-  else {
+  } else {
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steakhal wrote:

This is good!

https://github.com/llvm/llvm-project/pull/218860