[llvm] [DebugInfo] DWARFFormValue use formatv instead of format (PR #180498)

[Konrad Kleine via llvm-commits]

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@@ -623,10 +629,11 @@ Expected<const char *> DWARFFormValue::getAsCString() const {
     return Str;
   std::string Msg = FormEncodingString(Form).str();
   if (Index)
-    Msg += (" uses index " + Twine(*Index) + ", but the referenced string").str();
-  Msg += (" offset " + Twine(Offset) + " is beyond " +
-          (IsDebugLineString ? ".debug_line_str" : ".debug_str") + " bounds")
+    Msg += formatv(" uses index {0}, but the referenced string", *Index).str();
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kwk wrote:

This caused me a headache because when reformatting I accidentally pulled in everything until I realized what I've done. So adding the newline is probably a good idea. [09a181b](https://github.com/llvm/llvm-project/pull/180498/commits/09a181bfe2024e1b764cf1ff95cd91ace140d849)

https://github.com/llvm/llvm-project/pull/180498