foozy@708: $ \textbf{hg tag -r 1 v1.1}
foozy@708: $ \textbf{hg tags}
foozy@708: tip                                
foozy@708: v1.1                               
foozy@708: $ \textbf{hg tag -r 2 v1.1}
foozy@708: abort: a tag named v1.1 already exists (use -f to force)
foozy@708: $ \textbf{hg tag -f -r 2 v1.1}
foozy@708: $ \textbf{hg tags}
foozy@708: tip                                
foozy@708: v1.1