templatekw: fix shownames() to check if namespace exists in repo (issue6301) Namespace registration is dynamic, but the corresponding template keyword is registered statically.

wait-on-file: use proper variable in math This seems better and safer to be explicit. Differential Revision: https://phab.mercurial-scm.org/D8426

wait-on-file: don't quote arithmetic argument This is unnecessary and Mac OS X choke on them. Differential Revision: https://phab.mercurial-scm.org/D8425

graft: exit 1 on conflicts, like merge It's more consistent, and makes it nicer to script around hg if you don't have to ignore exit code 255, which is the error code for basically everything in hg. Differential Revision: https://phab.mercurial-scm.org/D8423