[llvm] [Support] Better error msg when cache dir can't be created. (PR #69575)

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git-clang-format --diff 3517b67ef021055d201234384359fa313f3312f7 c66936964c514b12e97be747d7f4384278cfd260 -- llvm/lib/Support/Caching.cpp
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View the diff from clang-format here.
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diff --git a/llvm/lib/Support/Caching.cpp b/llvm/lib/Support/Caching.cpp
index 722746e7b440..c13957ba8493 100644
--- a/llvm/lib/Support/Caching.cpp
+++ b/llvm/lib/Support/Caching.cpp
@@ -145,7 +145,8 @@ Expected<FileCache> llvm::localCache(const Twine &CacheNameRef,
       // ensures the filesystem isn't mutated until the cache is.
       if (std::error_code EC = sys::fs::create_directories(
               CacheDirectoryPath, /*IgnoreExisting=*/true))
-        return createStringError(EC, Twine("Can't create cache directory: ") + CacheDirectoryPath);
+        return createStringError(EC, Twine("Can't create cache directory: ") +
+                                         CacheDirectoryPath);
 
       // Write to a temporary to avoid race condition
       SmallString<64> TempFilenameModel;

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https://github.com/llvm/llvm-project/pull/69575