[dexp] Change FuzzyFind to also print scope of symbols

[kadircet]

Summary

When there are multiple symbols in the result of a fuzzy find with the
same name, one has to perform an additional query to figure out which of those
symbols are coming from the "interesting" scope. This patch prints the scope in
fuzzy find results to get rid of the second symbol.

clang-tools-extra/trunk/clangd/index/dex/dexp/Dexp.cpp

if (Scopes.getNumOccurrences() > 0) {
       Request.Scopes = {Scopes.begin(), Scopes.end()};
     }
     Request.AnyScope = Request.Scopes.empty();
     // FIXME(kbobyrev): Print symbol final scores to see the distribution.
     static const auto OutputFormat = "{0,-4} | {1,-40} | {2,-25}\n";
     outs() << formatv(OutputFormat, "Rank", "Symbol ID", "Symbol Name");
     size_t Rank = 0;
     Index->fuzzyFind(Request, [&](const Symbol &Sym) {
-      outs() << formatv(OutputFormat, Rank++, Sym.ID.str(), Sym.Name);
+      outs() << formatv(OutputFormat, Rank++, Sym.ID.str(),
+                        Sym.Scope + Sym.Name);
     });
   }
 };
 
 class Lookup : public Command {
   cl::opt<std::string> ID{
       "id",
       cl::Positional,