templatekw: specify plural form of instability
Follows up
40739aef97f7.
rebase: optimize "source" calculation in adjustdest
The "source" variable is calculated inside a loop but it does not depend on
loop variables. Therefore move it outside the loop.
Differential Revision: https://phab.mercurial-scm.org/D345
rebase: remove "state >= revtodo" condition
Now the minimal value of state is revtodo, that condition is always true,
therefore removed.
Differential Revision: https://phab.mercurial-scm.org/D344
rebase: remove self.destancestors
The state is no longer used after calculating "self.external", therefore
removed.
Differential Revision: https://phab.mercurial-scm.org/D343
rebase: remove rebaseset from _checkobsrebase
The parameter is not used. Therefore removed.
Differential Revision: https://phab.mercurial-scm.org/D85