$ \textbf{cd ..} $ \textbf{hg clone hello my-new-hello} 2 files updated, 0 files merged, 0 files removed, 0 files unresolved $ \textbf{cd my-new-hello} $ \textbf{sed -i '/printf/i\textbackslash{}\textbackslash{}tprintf("once more, hello.\textbackslash{}\textbackslash{}n");' hello.c} $ \textbf{hg commit -m 'A new hello for a new day.'}