[clang] [Clang] Don't ditch typo-corrected lookup result (PR #139374)

[via cfe-commits]

================
@@ -523,6 +523,9 @@ bool Sema::LookupTemplateName(LookupResult &Found, Scope 
*S, CXXScopeSpec &SS,
       if (Found.isAmbiguous()) {
         Found.clear();
       } else if (!Found.empty()) {
+        // Do not erase the typo-corrected result to avoid duplicating the typo
+        // correction in future.
----------------
cor3ntin wrote:

```suggestion
        // Do not erase the typo-corrected result to avoid duplicated 
diagnostics.
```

https://github.com/llvm/llvm-project/pull/139374
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