templates: widen the graph canvas (issue2683)

rebase: don't use util.Abort for an internal error

help: limit documentation width to at most 80 characters Reading long lines is suboptimal no matter how wide the terminal is.

merge with stable

transplant: avoid the word "rebase" when we mean "transplant"

transplant: explain that changesets are copied, not moved

hg: add support for cloning bookmarks

httprepo: use caps instead of between for compat check We usually query the capabilities at some point anyway so this way the first roundtrip actually does useful work.