ui: output the number of file updated/merged/removed/... on update
add a note for people to remember commiting after a merge.
adding aadding baNONEXISTENT: No such file or directoryaba: No such file or directoryNONEXISTENT: No such file or directorybaNONEXISTENT: No such file in rev 9e1684505872ab