[llvm] [MC] AsmLexer invalid read fix. (PR #154972)

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``````````bash
git-clang-format --diff origin/main HEAD --extensions cpp -- llvm/unittests/MC/MCParser.cpp llvm/lib/MC/MCParser/AsmLexer.cpp --diff_from_common_commit
``````````

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View the diff from clang-format here.
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``````````diff
diff --git a/llvm/unittests/MC/MCParser.cpp b/llvm/unittests/MC/MCParser.cpp
index 592e93e9b..0ed185fdf 100644
--- a/llvm/unittests/MC/MCParser.cpp
+++ b/llvm/unittests/MC/MCParser.cpp
@@ -6,10 +6,10 @@
 //
 //===----------------------------------------------------------------------===//
 
-#include "llvm/MC/MCParser/MCAsmParser.h"
-#include "llvm/MC/MCParser/AsmLexer.h"
-#include "llvm/MC/MCInstPrinter.h"
 #include "llvm/MC/MCAsmInfo.h"
+#include "llvm/MC/MCInstPrinter.h"
+#include "llvm/MC/MCParser/AsmLexer.h"
+#include "llvm/MC/MCParser/MCAsmParser.h"
 #include "llvm/MC/MCRegisterInfo.h"
 #include "llvm/MC/MCTargetOptions.h"
 #include "llvm/MC/TargetRegistry.h"
@@ -48,7 +48,7 @@ public:
 
 TEST_F(MCAsmParserTest, InvalidRead) {
   AsmLexer Lexer(*MAI);
-  const char* Source = "ret\0 ";
+  const char *Source = "ret\0 ";
   StringRef SourceRef(Source, 4); // Include null terminator in buffer length
   Lexer.setBuffer(SourceRef);
 

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https://github.com/llvm/llvm-project/pull/154972