[StringExtras] Fix comment typos (NFC)
diff --git a/llvm/include/llvm/ADT/StringExtras.h b/llvm/include/llvm/ADT/StringExtras.h
index 10596cf..68e8950 100644
--- a/llvm/include/llvm/ADT/StringExtras.h
+++ b/llvm/include/llvm/ADT/StringExtras.h
@@ -470,9 +470,9 @@
 /// list from a loop like so:
 ///
 /// \code
-///   ListSeparator SD;
+///   ListSeparator LS;
 ///   for (auto &I : C)
-///     OS << SD << I.getName();
+///     OS << LS << I.getName();
 /// \end
 class ListSeparator {
   bool First = true;