[clang-tools-extra] [Clangd] Sanitize path before recording into IncludeStructure during buildPreamble (PR #70798)

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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 562ce8bbd23d96ee64992bcda041bf67e7c51057 65c1b38c4eb83469794e53328caed492e956a728 -- clang-tools-extra/clangd/Headers.cpp
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View the diff from clang-format here.
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``````````diff
diff --git a/clang-tools-extra/clangd/Headers.cpp b/clang-tools-extra/clangd/Headers.cpp
index 5af7abd71ae1..446044a83a65 100644
--- a/clang-tools-extra/clangd/Headers.cpp
+++ b/clang-tools-extra/clangd/Headers.cpp
@@ -57,7 +57,8 @@ public:
       Inc.Written =
           (IsAngled ? "<" + FileName + ">" : "\"" + FileName + "\"").str();
       Inc.Resolved = std::string(
-          File ? maybeCaseFoldPath(getCanonicalPath(*File, SM.getFileManager()).value_or(""))
+          File ? maybeCaseFoldPath(
+                     getCanonicalPath(*File, SM.getFileManager()).value_or(""))
                : "");
       Inc.HashOffset = SM.getFileOffset(HashLoc);
       Inc.HashLine =
@@ -209,7 +210,8 @@ IncludeStructure::HeaderID IncludeStructure::getOrCreateID(FileEntryRef Entry) {
   // Main file's FileEntry was not known at IncludeStructure creation time.
   if (&Entry.getFileEntry() == MainFileEntry) {
     if (RealPathNames.front().empty())
-      RealPathNames.front() = maybeCaseFoldPath(MainFileEntry->tryGetRealPathName().str());
+      RealPathNames.front() =
+          maybeCaseFoldPath(MainFileEntry->tryGetRealPathName().str());
     return MainFileID;
   }
   auto R = UIDToIndex.try_emplace(
@@ -220,7 +222,8 @@ IncludeStructure::HeaderID IncludeStructure::getOrCreateID(FileEntryRef Entry) {
   IncludeStructure::HeaderID Result = R.first->getSecond();
   std::string &RealPathName = RealPathNames[static_cast<unsigned>(Result)];
   if (RealPathName.empty())
-    RealPathName = maybeCaseFoldPath(Entry.getFileEntry().tryGetRealPathName().str());
+    RealPathName =
+        maybeCaseFoldPath(Entry.getFileEntry().tryGetRealPathName().str());
   return Result;
 }
 

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https://github.com/llvm/llvm-project/pull/70798