When hg is invoked without parameters, the short list help is displayed. When hg is executed without parameters ( or hg is executed with the 'help shortlist' command ) the short help list is displayed. If the 'help' command is passed on the commandline the full help list is displayed. In both the cases if the switch '-v' is passed, the help contains also the aliases of the short/full commands list and the global switches.

+ hg clone a b
abort: repository a/.hg not found!
255
+ hg clone http://127.0.0.1:3121/a b
requesting all changes
abort: error: Connection refused
255
+ hg clone a b
abort: repository a/.hg not found!
255
+ hg init
+ hg clone . ../a
abort: destination '../a' already exists
1
+ hg clone a b
abort: repository a/.hg not found!
255
+ hg init
+ hg clone q
abort: destination 'q' already exists