[clang-format] Fix a clang-tidy warning, NFC
llvm-svn: 306409
diff --git a/clang/lib/Format/NamespaceEndCommentsFixer.cpp b/clang/lib/Format/NamespaceEndCommentsFixer.cpp
index 1bbb41f..85b70b8 100644
--- a/clang/lib/Format/NamespaceEndCommentsFixer.cpp
+++ b/clang/lib/Format/NamespaceEndCommentsFixer.cpp
@@ -174,7 +174,7 @@
AllNamespaceNames = "::" + NamespaceName + AllNamespaceNames;
continue;
}
- NamespaceName += std::move(AllNamespaceNames);
+ NamespaceName += AllNamespaceNames;
CompactedNamespacesCount = 0;
AllNamespaceNames = std::string();
}