[NFC] Fix typo in comment

llvm-svn: 349932
Cr-Mirrored-From: sso://chromium.googlesource.com/_direct/external/github.com/llvm/llvm-project
Cr-Mirrored-Commit: 5517aa61723b54cfb1c8ece6c7b7436b8f3b435a
diff --git a/include/variant b/include/variant
index b33b1c4..4a771dc 100644
--- a/include/variant
+++ b/include/variant
@@ -1066,7 +1066,7 @@
 #ifndef _LIBCPP_NO_EXCEPTIONS
       // EXTENSION: When the move construction of `__lhs` into `__rhs` throws
       // and `__tmp` is nothrow move constructible then we move `__tmp` back
-      // into `__rhs` and provide the strong exception safety guarentee.
+      // into `__rhs` and provide the strong exception safety guarantee.
       try {
         this->__generic_construct(*__rhs, _VSTD::move(*__lhs));
       } catch (...) {