Don't allow --style and --template for hg update and hg merge.
The only way that changesets will be shown with these command is in an error
message when trying to update to an ambiguous branch name.
pushing to ../a
searching for changes
abort: unsynced remote changes!
(did you forget to sync? use push -f to force)
pulling from ../a
searching for changes
adding changesets
adding manifests
adding file changes
added 1 changesets with 1 changes to 1 files (+1 heads)
(run 'hg heads' to see heads, 'hg merge' to merge)
pushing to ../a
searching for changes
abort: push creates new remote branches!
(did you forget to merge? use push -f to force)
pushing to ../a
searching for changes
adding changesets
adding manifests
adding file changes
added 2 changesets with 1 changes to 1 files
adding foo
merging foo
pushing to ../c
searching for changes
abort: push creates new remote branches!
(did you forget to merge? use push -f to force)
pushing to ../c
searching for changes
no changes found
pushing to ../c
searching for changes
abort: push creates new remote branches!
(did you forget to merge? use push -f to force)
pushing to ../c
searching for changes
abort: push creates new remote branches!
(did you forget to merge? use push -f to force)