[llvm] [Support] Use range-based for loops (NFC) (PR #169001)

[Jakub Kuderski via llvm-commits]

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@@ -602,10 +602,8 @@ static Option *LookupNearestOption(StringRef Arg,
   // Find the closest match.
   Option *Best = nullptr;
   unsigned BestDistance = 0;
-  for (StringMap<Option *>::const_iterator it = OptionsMap.begin(),
-                                           ie = OptionsMap.end();
-       it != ie; ++it) {
-    Option *O = it->second;
+  for (const auto &Opt : OptionsMap) {
+    Option *O = Opt.second;
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kuhar wrote:

Use structured bindings?

https://github.com/llvm/llvm-project/pull/169001