[llvm] [llvm][DebugInfo] formatv in DWARFContext (PR #191983)

[Sergei Barannikov via llvm-commits]

================
@@ -1184,7 +1186,7 @@ void DWARFContext::dump(
         DumpOpts.WarningHandler(std::move(Err));
         return;
       }
-      OS << format("0x%8.8" PRIx64 ": \"", StrOffset);
+      OS << formatv("{0:x+8}: \"", StrOffset);
----------------
s-barannikov wrote:

```suggestion
      OS << formatv("{0:x8}: \"", StrOffset);
```

https://github.com/llvm/llvm-project/pull/191983