[clang] [clang][analyzer] Model `strxfrm` (PR #156507)

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<!--LLVM CODE FORMAT COMMENT: {clang-format}-->


:warning: C/C++ code formatter, clang-format found issues in your code. :warning:

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``````````bash
git-clang-format --diff origin/main HEAD --extensions c,cpp -- clang/lib/StaticAnalyzer/Checkers/CStringChecker.cpp clang/test/Analysis/string.c
``````````

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View the diff from clang-format here.
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``````````diff
diff --git a/clang/lib/StaticAnalyzer/Checkers/CStringChecker.cpp b/clang/lib/StaticAnalyzer/Checkers/CStringChecker.cpp
index 296a803bd..9a4457ec7 100644
--- a/clang/lib/StaticAnalyzer/Checkers/CStringChecker.cpp
+++ b/clang/lib/StaticAnalyzer/Checkers/CStringChecker.cpp
@@ -101,7 +101,6 @@ public:
 
   static void *getTag() { static int tag; return &tag; }
 
-
   bool evalCall(const CallEvent &Call, CheckerContext &C) const;
   void checkPreStmt(const DeclStmt *DS, CheckerContext &C) const;
   void checkLiveSymbols(ProgramStateRef state, SymbolReaper &SR) const;
@@ -2336,8 +2335,8 @@ void CStringChecker::evalStrxfrm(CheckerContext &C,
   } else {
     // Fallback: invalidate the buffer.
     StateSizeNonZero = invalidateDestinationBufferBySize(
-          C, StateSizeNonZero, Dest.Expression, Call.getCFGElementRef(), destVal,
-          sizeVal, Size.Expression->getType());
+        C, StateSizeNonZero, Dest.Expression, Call.getCFGElementRef(), destVal,
+        sizeVal, Size.Expression->getType());
 
     C.addTransition(StateSizeNonZero);
   }

``````````

</details>


https://github.com/llvm/llvm-project/pull/156507